Thai security personnel inspect the site of a bomb attack in Hat Yai district of Songkhla province, south of Bangkok May 6, 2014. Two bombs exploded minutes apart in the southern Thai city of Hat Yai on Tuesday, wounding five people, and police said they suspected Muslim rebels were responsible. One bomb exploded outside a convenience store near a school while a second bomb went off near a police station. REUTERS/ Surapan Boonthanom (THAILAND - Tags: POLITICS CIVIL UNREST) 

A suspected Uighur from China's troubled far-western region of Xinjiang, holds his son at a temporally shelter after they were detained at the immigration regional headquarters near the Thailand-Malaysia border in Hat Yai, Songkla March 14, 2014. About 200 people rescued by police from a human smuggling camp in southern Thailand on Wednesday are suspected Uighur Muslims from China's troubled far-western region of Xinjiang, say Thai police. REUTERS/Athit Perawongmetha (THAILAND - Tags: POLITICS SOCIETY IMMIGRATION) 

A suspected Uighur from China's troubled far-western region of Xinjiang, weeps as he speaks with a translator after being detained at the immigration regional headquarters near the Thailand-Malaysia border in Hat Yai, Songkla March 14, 2014. About 200 people rescued by police from a human smuggling camp in southern Thailand on Wednesday are suspected Uighur Muslims from China's troubled far-western region of Xinjiang, say Thai police. REUTERS/Athit Perawongmetha (THAILAND - Tags: POLITICS SOCIETY IMMIGRATION) 

Suspected Uighurs from China's troubled far-western region of Xinjiang, sit inside a temporary shelter after they were detained at the immigration regional headquarters near the Thailand-Malaysia border in Hat Yai, Songkla March 14, 2014. About 200 people rescued by police from a human smuggling camp in southern Thailand on Wednesday are suspected Uighur Muslims from China's troubled far-western region of Xinjiang, say Thai police. REUTERS/Athit Perawongmetha (THAILAND - Tags: POLITICS SOCIETY IMMIGRATION) 

Suspected Uighurs from China's troubled far-western region of Xinjiang, rest inside a temporary shelter after they were detained at the immigration regional headquarters near the Thailand-Malaysia border in Hat Yai, Songkla March 14, 2014. About 200 people rescued by police from a human smuggling camp in southern Thailand on Wednesday are suspected Uighur Muslims from China's troubled far-western region of Xinjiang, say Thai police. REUTERS/Athit Perawongmetha (THAILAND - Tags: POLITICS SOCIETY IMMIGRATION TPX IMAGES OF THE DAY) 

A suspected Uighur from China's troubled far-western region of Xinjiang, reads the Koran inside a temporary shelter after being detained at the immigration regional headquarters near the Thailand-Malaysia border in Hat Yai, Songkla March 14, 2014. About 200 people rescued by police from a human smuggling camp in southern Thailand on Wednesday are suspected Uighur Muslims from China's troubled far-western region of Xinjiang, say Thai police. REUTERS/Athit Perawongmetha (THAILAND - Tags: POLITICS SOCIETY IMMIGRATION) 

Suspected Uighurs from China's troubled far-western region of Xinjiang, look on inside a temporary shelter after they were detained at the immigration regional headquarters near the Thailand-Malaysia border in Hat Yai, Songkla March 14, 2014. About 200 people rescued by police from a human smuggling camp in southern Thailand on Wednesday are suspected Uighur Muslims from China's troubled far-western region of Xinjiang, say Thai police. REUTERS/Athit Perawongmetha (THAILAND - Tags: POLITICS SOCIETY IMMIGRATION) 

A suspected Uighur from China's troubled far-western region of Xinjiang, rests on a ground inside a temporary shelter after being detained at the immigration regional headquarters near the Thailand-Malaysia border in Hat Yai, Songkla March 14, 2014. About 200 people rescued by police from a human smuggling camp in southern Thailand on Wednesday are suspected Uighur Muslims from China's troubled far-western region of Xinjiang, say Thai police. REUTERS/Athit Perawongmetha (THAILAND - Tags: POLITICS SOCIETY IMMIGRATION) 

Children of suspected Uighurs from China's troubled far-western region of Xinjiang, rest on a ground inside a temporary shelter after they were detained at the immigration regional headquarters near the Thailand-Malaysia border in Hat Yai, Songkla March 14, 2014. About 200 people rescued by police from a human smuggling camp in southern Thailand on Wednesday are suspected Uighur Muslims from China's troubled far-western region of Xinjiang, say Thai police. REUTERS/Athit Perawongmetha (THAILAND - Tags: POLITICS SOCIETY IMMIGRATION) 

A suspected Uighur from China's troubled far-western region of Xinjiang, holds an infant as they rest inside a temporary shelter after they were detained at the immigration regional headquarters near Thailand-Malaysia border in Hat Yai, Songkla March 14, 2014. About 200 people rescued by police from a human smuggling camp in southern Thailand on Wednesday are suspected Uighur Muslims from China's troubled far-western region of Xinjiang, say Thai police. REUTERS/Athit Perawongmetha (THAILAND - Tags: POLITICS SOCIETY IMMIGRATION) 

A member of Nok Air's ground staff smiles as passengers check in for their flight at Hat Yai airport June 20, 2013. Shares in budget carrier Nok Airlines Pcl jumped 12 percent to 29 baht ($0.94) versus its IPO price of 26 baht ($0.84) on its market debut, outperforming other airline shares, thanks to its attractive valuation and growth prospect. REUTERS/Damir Sagolj (THAILAND - Tags: SOCIETY BUSINESS TRANSPORT) 

Nok Air flight attendants serve passengers on a flight between Hat Yai and Bangkok June 20, 2013. Shares in budget carrier Nok Airlines Pcl jumped 12 percent to 29 baht ($0.94) versus its IPO price of 26 baht ($0.84) on its market debut, outperforming other airline shares, thanks to its attractive valuation and growth prospect. REUTERS/Damir Sagolj (THAILAND - Tags: SOCIETY BUSINESS TRANSPORT TPX IMAGES OF THE DAY) 

Damage is seen at the site of an explosion at Lee Gardens Plaza hotel, in the shopping district of Hat Yai, Songkhla province, April 1, 2012. Five people, including a Malaysian tourist, were killed and more than 300 people were hurt, after a car bomb parked in the underground parking of the hotel went off on Saturday, National Police Chief Priewpan Damapong said. REUTERS/ Surapan Boonthanom (THAILAND - Tags: POLITICS CIVIL UNREST) 

Thai officials inspect the site of an explosion at Lee Gardens Plaza hotel, in the shopping district of Hat Yai, Songkhla province, April 1, 2012. Five people, including a Malaysian tourist, were killed and more than 300 people were hurt, after a car bomb parked in the underground parking of the hotel went off on Saturday, National Police Chief Priewpan Damapong said. REUTERS/ Surapan Boonthanom (THAILAND - Tags: POLITICS CIVIL UNREST) 

Thai officials inspect the site of an explosion at Lee Gardens Plaza hotel, in the shopping district of Hat Yai, Songkhla province, April 1, 2012. Five people, including a Malaysian tourist, were killed and more than 300 people were hurt, after a car bomb parked in the underground parking of the hotel went off on Saturday, National Police Chief Priewpan Damapong said. REUTERS/ Surapan Boonthanom (THAILAND - Tags: POLITICS CIVIL UNREST) 

Thai officials inspect the site of an explosion at Lee Gardens Plaza hotel, in the shopping district of Hat Yai, Songkhla province, April 1, 2012. Five people, including a Malaysian tourist, were killed and more than 300 people were hurt, after a car bomb parked in the underground parking of the hotel went off on Saturday, National Police Chief Priewpan Damapong said. REUTERS/ Surapan Boonthanom (THAILAND - Tags: POLITICS CIVIL UNREST) 

Residents clean their shop after flooding in Hat Yai district, Songkhla province, south of Bangkok November 4, 2010. Transport and communications were severed and tourists stranded on Wednesday after southern Thailand's worst floods in a decade forced flight cancellations and left a bustling city in deep water. REUTERS/Chaiwat Subprasom (THAILAND - Tags: DISASTER ENVIRONMENT) 

A resident looks for salvageable materials after flooding in Hat Yai district, Songkhla province, south of Bangkok November 4, 2010. Transport and communications were severed and tourists stranded on Wednesday after southern Thailand's worst floods in a decade forced flight cancellations and left a bustling city in deep water. REUTERS/Chaiwat Subprasom (THAILAND - Tags: DISASTER ENVIRONMENT) 

A resident clean her house after flooding in Hat Yai district, Songkhla province, south of Bangkok November 4, 2010. Transport and communications were severed and tourists stranded on Wednesday after southern Thailand's worst floods in a decade forced flight cancellations and left a bustling city in deep water. REUTERS/Chaiwat Subprasom (THAILAND - Tags: DISASTER ENVIRONMENT) 

A resident cleans her house after flooding in Hat Yai district, Songkhla province, south of Bangkok November 4, 2010. Transport and communications were severed and tourists stranded on Wednesday after southern Thailand's worst floods in a decade forced flight cancellations and left a bustling city in deep water. REUTERS/Chaiwat Subprasom (THAILAND - Tags: DISASTER ENVIRONMENT) 

A resident looks for salvageable materials after flooding in Hat Yai district, Songkhla province south of Bangkok November 4, 2010. Transport and communications were severed and tourists stranded on Wednesday after southern Thailand's worst floods in a decade forced flight cancellations and left a bustling city in deep water. REUTERS/Chaiwat Subprasom (THAILAND - Tags: DISASTER ENVIRONMENT) 

An aerial view shows floodwaters in Hat Yai district, Songkhla province south of Bangkok November 3, 2010. Transport and communications were severed and tourists stranded on Wednesday after southern Thailand's worst floods in a decade forced flight cancellations and left a bustling city in deep water. REUTERS/Chaiwat Subpransom (THAILAND - Tags: DISASTER ENVIRONMENT) 

An aerial view shows floodwaters in Hat Yai district, Songkhla province south of Bangkok November 3, 2010. Transport and communications were severed and tourists stranded on Wednesday after southern Thailand's worst floods in a decade forced flight cancellations and left a bustling city in deep water. REUTERS/Chaiwat Subpransom (THAILAND - Tags: DISASTER ENVIRONMENT) 

An aerial view shows floodwaters in Hat Yai district, Songkhla province south of Bangkok November 3, 2010. Transport and communications were severed and tourists stranded on Wednesday after southern Thailand's worst floods in a decade forced flight cancellations and left a bustling city in deep water. REUTERS/Chaiwat Subpransom (THAILAND - Tags: DISASTER ENVIRONMENT) 

An aerial view shows floodwaters in Hat Yai district, Songkhla province south of Bangkok November 3, 2010. Transport and communications were severed and tourists stranded on Wednesday after southern Thailand's worst floods in a decade forced flight cancellations and left a bustling city in deep water. REUTERS/Chaiwat Subpransom (THAILAND - Tags: DISASTER ENVIRONMENT) 

A resident carries his bicycle through a flooded road in Hat Yai district, Songkhla province south of Bangkok November 3, 2010. Transport and communications were severed and tourists stranded on Wednesday after southern Thailand's worst floods in a decade forced flight cancellations and left a bustling city in deep water. REUTERS/Chaiwat Subpransom (THAILAND - Tags: DISASTER ENVIRONMENT) 

A resident looks for salvageable materials during a flood in Hat Yai district, Songkhla province south of Bangkok November 3, 2010. Transport and communications were severed and tourists stranded on Wednesday after southern Thailand's worst floods in a decade forced flight cancellations and left a bustling city in deep water. REUTERS/Chaiwat Subpransom (THAILAND - Tags: DISASTER ENVIRONMENT) 

Residents stand in floodwaters in Hat Yai district, Songkhla province south of Bangkok November 3, 2010. Transport and communications were severed and tourists stranded on Wednesday after southern Thailand's worst floods in a decade forced flight cancellations and left a bustling city in deep water. REUTERS/Chaiwat Subpransom (THAILAND - Tags: DISASTER ENVIRONMENT) 

Residents sit in floodwaters in Hat Yai district, Songkhla province south of Bangkok November 3, 2010. Transport and communications were severed and tourists stranded on Wednesday after southern Thailand's worst floods in a decade forced flight cancellations and left a bustling city in deep water. REUTERS/Chaiwat Subpransom (THAILAND - Tags: DISASTER ENVIRONMENT) 

Residents push a mattress that their son is sitting on through a flood in Hat Yai district, Songkhla province south of Bangkok November 3, 2010. Transport and communications were severed and tourists stranded on Wednesday after southern Thailand's worst floods in a decade forced flight cancellations and left a bustling city in deep water. REUTERS/Chaiwat Subpransom (THAILAND - Tags: DISASTER ENVIRONMENT) 

A soldier carries a woman injured during a flood in Hat Yai district, Songkhla province south of Bangkok November 3, 2010. Transport and communications were severed and tourists stranded on Wednesday after southern Thailand's worst floods in a decade forced flight cancellations and left a bustling city in deep water. REUTERS/Chaiwat Subpransom (THAILAND - Tags: DISASTER ENVIRONMENT) 

A girl sits in floodwater in Hat Yai district, Songkhla province south of Bangkok November 3, 2010. Transport and communications were severed and tourists stranded on Wednesday after southern Thailand's worst floods in a decade forced flight cancellations and left a bustling city in deep water. REUTERS/Chaiwat Subpransom (THAILAND - Tags: DISASTER ENVIRONMENT) 

Residents receive water during a flood in Hat Yai district, Songkhla province south of Bangkok November 3, 2010. Transport and communications were severed and tourists stranded on Wednesday after southern Thailand's worst floods in a decade forced flight cancellations and left a bustling city in deep water. REUTERS/Chaiwat Subpransom (THAILAND - Tags: DISASTER ENVIRONMENT) 

A resident carrying his daughter wades through floodwaters in Hat Yai district, Songkhla province south of Bangkok November 3, 2010. Transport and communications were severed and tourists stranded on Wednesday after southern Thailand's worst floods in a decade forced flight cancellations and left a bustling city in deep water. REUTERS/Chaiwat Subpransom (THAILAND - Tags: DISASTER ENVIRONMENT) 

Residents carrying their belongings wade through floodwaters in Hat Yai district, Songkhla province south of Bangkok November 3, 2010. Transport and communications were severed and tourists stranded on Wednesday after southern Thailand's worst floods in a decade forced flight cancellations and left a bustling city in deep water. REUTERS/Chaiwat Subpransom (THAILAND - Tags: DISASTER ENVIRONMENT) 

A resident holds her food during a flood in Hat Yai district, Songkhla province south of Bangkok November 3, 2010. Transport and communications were severed and tourists stranded on Wednesday after southern Thailand's worst floods in a decade forced flight cancellations and left a bustling city in deep water. REUTERS/Chaiwat Subpransom (THAILAND - Tags: DISASTER ENVIRONMENT) 

A resident cooks during a flood in Hat Yai district, Songkhla province south of Bangkok November 3, 2010. Transport and communications were severed and tourists stranded on Wednesday after southern Thailand's worst floods in a decade forced flight cancellations and left a bustling city in deep water. REUTERS/Chaiwat Subpransom (THAILAND - Tags: DISASTER ENVIRONMENT) 

Residents carrying their belongings wade through floodwaters in Hat Yai district, Songkhla province south of Bangkok November 3, 2010. Transport and communications were severed and tourists stranded on Wednesday after southern Thailand's worst floods in a decade forced flight cancellations and left a bustling city in deep water. REUTERS/Chaiwat Subpransom (THAILAND - Tags: DISASTER ENVIRONMENT) 

Residents walk through floodwaters in Hat Yai district, Songkhla province south of Bangkok November 3, 2010. Transport and communications were severed and tourists stranded on Wednesday after southern Thailand's worst floods in a decade forced flight cancellations and left a bustling city in deep water. REUTERS/Chaiwat Subpransom (THAILAND - Tags: DISASTER ENVIRONMENT IMAGES OF THE DAY) 

Anti-government demonstrators set up a stage on the main road outside Hat Yai airport September 3, 2008. Flights to the southern Thai city of Hat Yai were disrupted for a second day after protesters blocked roads to the airfield. REUTERS/Surapan Boonthanom (THAILAND) 

Policemen with riot gear keep guard near anti-government demonstrators outside Hat Yai airport September 3, 2008. Flights to the southern Thai city of Hat Yai were disrupted for a second day after protesters blocked roads to the airfield. REUTERS/Surapan Boonthanom (THAILAND) 

An airport worker takes her children to school past the gates of Hat Yai airport after it was shut down by anti-government demonstrators on September 3, 2008. Flights to the southern Thai city of Hat Yai were disrupted for a second day after protesters blocked roads to the airfield. REUTERS/Surapan Boonthanom (THAILAND) 

A security guard looks out towards anti-government demonstrators past the gates of southern Thailand's Hat Yai airport September 3, 2008. Flights to Hat Yai were disrupted for a second day after protesters blocked roads to the airfield. REUTERS/Surapan Boonthanom (THAILAND) 

Policemen, with their riot gear in the foreground, stand guard near anti-government demonstrators outside Hat Yai airport September 3, 2008. Flights to the southern Thai city of Hat Yai were disrupted for a second day after protesters blocked roads to the airfield. REUTERS/Surapan Boonthanom (THAILAND) 

Police in riot gear keep guard outside southern Thailand's Hat Yai airport September 3, 2008. Airlines halted flights to the southern commercial capital of Hat Yai after anti-government protesters marched to the airport on Tuesday. Revered Thai King Bhumibol Adulyadej is pictured in the background. REUTERS/Surapan Boonthanom (THAILAND) 

Police in riot gear keep guard outside southern Thailand's Hat Yai airport September 3, 2008. Airlines halted flights to the southern commercial capital of Hat Yai after anti-government protesters marched to the airport on Tuesday. REUTERS/Surapan Boonthanom (THAILAND) 

Hundreds of supporters of the People's Alliance for Democracy (PAD) prepare to board a train in Hat Yai headed to Bangkok June 19, 2008. Hundreds of PAD supporters prepared to travel to Bangkok from southern Thailand's Hat Yai province to join thousands expected to protest outside the Government House on June 20. Thai police will deploy 4,500 officers at the prime minister's office to repel protesters whose four-week campaign to unseat the government has rattled investors and stoked fears of another coup, a spokesman said on Thursday. REUTERS/Surapan Boonthanom (THAILAND) 

A supporter of the People's Alliance for Democracy (PAD) shouts anti-government slogans while preparing to board a train in Hat Yai with hundreds of others to Bangkok June 19, 2008. Hundreds of PAD supporters prepared to travel to Bangkok from southern Thailand's Hat Yai province to join thousands expected to protest outside the Government House on June 20. Thai police will deploy 4,500 officers at the prime minister's office to repel protesters whose four-week campaign to unseat the government has rattled investors and stoked fears of another coup, a spokesman said on Thursday. REUTERS/Surapan Boonthanom (THAILAND) 

A woman stands in a school, which was burnt, in Thailand's Yala province, about 1084 km (674 miles) south of Bangkok, June 8, 2007. REUTERS/Surapan Boonthanom (THAILAND) 

Children play near a school, which was burnt, in Thailand's Yala province, about 1084 km (674 miles) south of Bangkok, June 8, 2007. REUTERS/Surapan Boonthanom (THAILAND) 

Children look at books after a school was burnt in Thailand's Yala province, about 1084 km (674 miles) south of Bangkok, June 8, 2007. REUTERS/Surapan Boonthanom (THAILAND) 

Children look at a school, which was burnt, in Thailand's Yala province, about 1084 km (674 miles) south of Bangkok, June 8, 2007. REUTERS/Surapan Boonthanom (THAILAND) 

Children play with a police officer at a school, which was burnt, in Thailand's Yala province, about 1084 km (674 miles) south of Bangkok, June 8, 2007. REUTERS/Surapan Boonthanom (THAILAND) 

Military officials keep guard in the commercial district of southern Thailand's Hat Yai province May 27, 2007. Seven bombs exploded around Hat Yai's commercial district late evening Sunday, leaving nine injured, police said. REUTERS/Surapan Boonthanom (THAILAND) 

Police officials stand near the site of a bomb blast in southern Thailand's Hat Yai province May 27, 2007. Seven bombs exploded around Hat Yai's commercial district late evening Sunday, leaving nine injured, police said. REUTERS/Surapan Boonthanom (THAILAND) 

A military official stands guard in front of a pharmacy, where a bomb explosion left the entrance destroyed, in southern Thailand's Hat Yai province May 27, 2007. Seven bombs exploded around Hat Yai's commercial district late evening Sunday, leaving nine injured, police said. REUTERS/Surapan Boonthanom (THAILAND) 

Locals and police officials stand near by a bomb scene in the southern Thai city Hat Yai early September 17, 2006. Six simultaneous motorcycle bombs killed at least three people and wounded more than 60 on a busy street in the southern Thai town of Hat Yai on Saturday, police said. REUTERS/Surapan Boonthanom (THAILAND) 

Police officials search for evidence at a bomb scene in the southern Thai city Hat Yai, early September 17, 2006. Six simultaneous motorcycle bombs killed at least three people and wounded more than 60 on a busy street in the southern Thai town of Hat Yai on Saturday, police said. REUTERS/Surapan Boonthanom (THAILAND) 

Police officers search for evidence at the site of a bomb blast in the southern Thai city of Hat Yai early morning September 17, 2006. Six simultaneous motorcycle bombs killed at least three people and wounded more than 60 on a busy street in the southern Thai town of Hat Yai on Saturday, police said. REUTERS/Surapan Boonthanom