Thousands of people march during an annual nationalist demonstration in favour of ETA prisoners rights in Bilbao, January 7, 2012. REUTERS/Vincent West (SPAIN - Tags: POLITICS CIVIL UNREST) 

People walk behind a poster displaying pictures of ETA victims during the inauguration of the exhibition "The Civil Guard, shield of democracy against terrorism" in the Andalusian capital of Seville October 24, 2011. The Basque separatist group ETA said on October 20, 2011 it was ending four decades of armed struggle and called for talks with the Spanish and French authorities on ending Europe's last major guerrilla conflict. REUTERS/Marcelo del Pozo (SPAIN - Tags: POLITICS MILITARY) 

SPAIN-ETA/ - Illustrated timeline of Basque separatist group ETA. RNGS. (SIN07) 

A municipal worker paints over graffiti reading "ETA, The People Are With You" in Guernica October 21, 2011, the day after Basque separatist group ETA announced a definitive cessation of armed activity. Spanish Basque armed separatists ETA have called a definitive end to 50 years of armed struggle which has cost the lives of at least 850 people, the band said in a statement published in Basque language newspaper Gara. REUTERS/Vincent West (SPAIN - Tags: POLITICS CIVIL UNREST) 

A man walks past the serpent and hatchet anagram of armed Basque separatists ETA ( Euskadi Ta Askatasuna- Basque Country and Freedom) in the northern Navarran town of Leitza February 2, 2011. Bietan Jarrai ("Continue With Both") refers to the figures of the snake (representing politics) wrapped around a hatchet (representing armed struggle). REUTERS/Vincent West (SPAIN - Tags: POLITICS CIVIL UNREST) 

A woman walks past the serpent and hatchet anagram of armed Basque separatists ETA ( Euskadi Ta Askatasuna- Basque Country and Freedom) in the northern Navarran town of Leitza February 2, 2011. Bietan Jarrai ("Continue With Both") refers to the figures of the snake (representing politics) wrapped around a hatchet (representing armed struggle). REUTERS/Vincent West (SPAIN - Tags: POLITICS CIVIL UNREST) 

A man walks past graffiti reading in Basque "ETA. The people are with you.", in Guernica January 19, 2011. Armed Basque separatists ETA (Euskadi Ta Askatasuna- Basque Country and Freedom) released a video and communique on January 10 declaring a "permanent, general and internationally verifiable" cease-fire. REUTERS/Vincent West (SPAIN - Tags: POLITICS CIVIL UNREST) 

A woman walks past graffiti reading "Up with military ETA" in the Spanish Basque city of Bilbao January 12, 2011. REUTERS/Vincent West (SPAIN - Tags: POLITICS CIVIL UNREST) 

A video message of Basque separatist group ETA declaring a permanent ceasefire is displayed on a television in a department store in Bilbao January 10, 2011. Spain's government rejected a permanent ceasefire declared by the Basque separatist group ETA on Monday, saying it did not go far enough. REUTERS/Vincent West (SPAIN - Tags: POLITICS CIVIL UNREST) 

Videos showing members of armed separatists ETA announcing a permanent ceasefire are displayed on television screens in a supermarket in Guernica January 10, 2011. The ETA called for a permanent truce on Monday, Basque-language newspaper Gara said on its website, three months after the weakened group announced a halt to armed attacks. REUTERS/Vincent West (SPAIN - Tags: POLITICS CIVIL UNREST) 

Children walk past a banner reading "Borroka Da Bidea" (The Fight Is The Way) and graffiti in favour of armed pro-Basque independence group ETA in Berango, 15km (9 miles) from Bilbao, September 26, 2010. Basque separatists ETA laid out conditions on Sunday for an end to its violent campaign for independence from Spain, warning that it reserves the right to defend itself during a so-called "ceasefire". REUTERS/Vincent West (SPAIN - Tags: POLITICS CIVIL UNREST) 

SPAIN-ETA/ - Profile of Basque rebel group ETA with timeline of major events since the group was founded. RNGS. (SIN01) 

Francisco Javier Garcia Gaztelu, known as "Txapote", former military chief of Basque separatist group ETA, attends his trial at Madrid's Spanish High Court July 5, 2010. 'Txapote' is being judged for handing over weapons to the ETA cell "Aralar" and for ordering the cell to travel to Madrid to look out for targets. REUTERS/J.J. Guillen/Pool (SPAIN - Tags: CRIME LAW IMAGES OF THE DAY) 

Hooded French anti-terrorist police evacuate a suspected member of the Basque separatist movement ETA in a car after arrests in the southwestern town of Bayonne May 20, 2010. A man and a woman belonging to the group were arrested along with Mikel Kabikoitz Karrera Sarobe, known as Ata, according to French police. REUTERS/Amaia Zabalo (FRANCE - Tags: POLITICS CIVIL UNREST CRIME LAW) 

FRANCE-SHOOTING/ - Map locating Dammarie-les-Lys, near Paris, where a police officer was shot dead on Tuesday night by a suspected ETA commando group. (SIN01) 

FRANCE-SHOOTING/ - Map locating Dammarie-les-Lys, near Paris, where a police officer was shot dead on Tuesday night by a suspected ETA commando group. (SIN01) 

A man walks past a graffiti reading "Salute and Honour, Jon" and an ETA symbol in the Basque town of Gernika March 14, 2010. A judicial inquiry has opened in France following the identification of the body of a missing member of Basque separatist group ETA, the public prosecutor of the southern French city Bayonne said on Friday. Jon Anza, who served 20 years in prison from 1982 to 2002 for ETA-related crimes, disappeared in April 2009 after taking a train from Bayonne to Toulouse. Basque nationalists accuse the Spanish government of having caused Anza's death during a secret operation, an accusation denied by Madrid. REUTERS/Vincent West (SPAIN - Tags: POLITICS CIVIL UNREST IMAGES OF THE DAY) 

Basque police lead suspected leader of an ETA cell, Ibon Iparraguirre, away from a "Zulo" (arms and explosives hide) following a search in woods near the fishing town of Ondarroa January 29, 2010.Members of the Ertzaintza (Basque police force) arrested on Tuesday five suspected members of Basque armed separatists ETA and two more on Thursday who may have been involved in a car bomb attack on a police station in September 2008, police said. REUTERS/Vincent West (SPAIN - Tags: POLITICS CIVIL UNREST IMAGES OF THE DAY) 

Tourists watch flames from a car after a bomb exploded outside offices run by the Civil Guard paramilitary police in Palmanova, in the Balearic Island of Mallorca, July 30, 2009. A car bomb on the Spanish holiday island of Mallorca killed two police officers on Thursday, just a day after a similar attack blamed on Basque separatists ETA in northern Spain, officials said. Picture taken with a mobile phone. REUTERS/Pablo Navarrete (SPAIN CRIME LAW CONFLICT POLITICS IMAGES OF THE DAY) 

An investigator stands beside the wreckage of a car in Palmanova, in the Balearic Island of Mallorca, July 30, 2009. At least two people were killed by a car bomb at a Civil Guard barracks on the Spanish island of Mallorca, officials said on Thursday, a day after a similar attack blamed on Basque separatists ETA in northern Spain. REUTERS/Dani Cardona (SPAIN CRIME LAW CONFLICT POLITICS IMAGES OF THE DAY) 

The facade of a Civil Guard barracks is seen with extensive damage and water pipes exposed in a giant crater where a car bomb exploded in the northern Spanish city of Burgos, early July 29, 2009. At least 46 people were slightly injured according to emergency services. Part of the barracks facade collapsed into the street when the bomb went off around 4.30 a.m. (0230 GMT). A spokeswoman for the Civil Guard, Spain's paramilitary police force, said the attack was probably carried out by Basque separatist rebels ETA. REUTERS/Felix Ordonez (SPAIN CONFLICT POLITICS IMAGES OF THE DAY) 

Suspected Basque separatist rebel group ETA military chief Garikoitz Aspiazu Rubina, known as "Txeroki" or "Cherokee", and his companion Leire Lopez Zurutuza, covered by blankets, are driven away by hooded police during their transfer from Cauterets to Bayonne in southwestern France late November 17, 2008. The suspected military leader of Basque separatist group ETA has been arrested in France, Spanish and French authorities said on Monday. REUTERS/Laurent Dard (FRANCE) 

Suspected Basque separatist rebel group ETA military chief Garikoitz Aspiazu Rubina, known as "Txeroki" or "Cherokee", and his companion Leire Lopez Zurutuza, covered by blankets, are accompanied by hooded judicial police during their transfer from Cauterets to Bayonne in southwestern France late November 17, 2008. The suspected military leader of Basque separatist group ETA has been arrested in France, Spanish and French authorities said on Monday. REUTERS/Laurent Dard (FRANCE) 

Suspected Basque separatist rebel group ETA military chief Garikoitz Aspiazu Rubina, known as "Txeroki" or "Cherokee", covered by a blanket, is taken away by hooded police during his transfer from Cauterets to Bayonne in southwestern France late November 17, 2008. The suspected military leader of Basque separatist group ETA has been arrested in France, Spanish and French authorities said on Monday. REUTERS/Laurent Dard (FRANCE) 

A police handout photo shows Garikoitz Aspiazu Rubina, known by his alias "Txeroki". The suspected military leader of Basque separatist rebel group ETA has been arrested in south western France, the French interior ministry said November 17, 2008, the biggest blow to the organisation in months. Garikoitz Aspiazu Rubina, known by his alias "Txeroki" or "Cherokee", was arrested in France's mountainous Pyrenean region, near the Spanish border, said the interior ministry statement, which misspelled his surname as Asiazu. The ministry said Aspiazu was suspected of having killed two Spanish civil guard police in December 2007. REUTERS/HO/Spanish Interior Ministry (SPAIN) 

A policeman walks past a damaged courthouse in Tolosa October 4, 2008. A bomb left in a bag exploded outside the courthouse in northern Spain on Saturday, damaging buildings but hurting no one shortly after a warning call claiming to be from Basque rebels ETA, a police spokesman said. REUTERS/Vincent West (SPAIN) 

A protester is arrested by riot police during disturbances after police dispersed an illegal rally in favour of ETA prisoners in San Sebastian September 14, 2008. REUTERS/Vincent West (SPAIN) 

A protester is arrested by riot police during disturbances after police dispersed an illegal rally in favour of ETA prisoners in San Sebastian September 14, 2008. REUTERS/Vincent West (SPAIN) 

Masked protesters throw bottles and stones at riot police during disturbances after police dispersed an illegal rally in favour of ETA prisoners in San Sebastian September 14, 2008. REUTERS/Vincent West (SPAIN) 

Convicted ETA killer Jose Ignacio de Juana Chaos (C) rides in a car with lawyers Jone Goirizelaia (L) and Alvaro Reizabal after he was released from prison in Aranjuez, outside Madrid, August 2, 2008. Chaos, responsible for 25 murders committed in the eighties in the name of Basque separatists ETA, was released after spending 21-years in jail. REUTERS/Paul Hanna (SPAIN) 

Spanish police examine the damage to a Red Cross beach hut shortly after the second of two explosions in Laredo, northern Spain July 20, 2008. Four bombs exploded in Cantabria, northern Spain on Sunday, after warning calls from the Basque separatist group ETA. There were no casualties because the authorities evacuated the areas in response to the warning. REUTERS/Vincent West (SPAIN) 

One of the four members of the armed Basque group ETA Igor Suberbiola is escorted by police as he leaves the house where he was arrested earlier in Bordeaux, southwestern France, May 22, 2008. The leader of Basque separatist group ETA Francisco Javier Lopez Pena, who had been on the run for more than 20 years and was also known as Thierry, was arrested together with three other suspected ETA leaders in the southwestern French city of Bordeaux late on Tuesday late May 20, 2008, a police source said. REUTERS/Olivier Pon (FRANCE) 

Francisco Javier Lopez Pena, leader of Basque separatist group ETA, shouts slogan as he leaves the house where he was arrested by French police earlier in Bordeaux, southwestern France, May 22, 2008. The leader of Basque separatist group ETA has been arrested in what Spanish officials described on Wednesday as a heavy blow to the guerrilla group and its bombing campaign in Spain. Pena, also known as Thierry, and three other ETA leaders were arrested by French police in a raid in the centre of the southwestern city of Bordeaux late May 20, 2008, a police source said. REUTERS/Olivier Pon (FRANCE) 

Protesters carry pictures of ETA prisoners during a demonstration in favour of a general amnesty organized by banned pro-Basque prisoners association Askatasuna in Bilbao May 17, 2008. REUTERS/Vincent West (SPAIN) 

A French policeman leaves an apartment where three suspected members of the Basque separatist group ETA were arrested in Bagnere-de-Bigorre, southwestern France, June 7, 2007. French anti-terrorist police arrested three suspected members of ETA in southern France on Thursday, two days after the group told the Spanish government it was ending a 15-month ceasefire. REUTERS/Laurent Dard (FRANCE) 

An old man walks past graffiti depicting the logo of Basque separatist group ETA in Goizueta in this May 25, 2005 file photo. Basque rebels ETA said they will end their 15-month-old ceasefire at midnight Tuesday and warned of more attacks to add to their bombing of Madrid airport in December 2006. ETA declared a ceasefire in March 2006 and had insisted that it still held despite killing two people with a bomb in Madrid's Barajas airport in December 2006. REUTERS/Pablo Sanchez/Files (SPAIN) 

A Basque policemen uses a video camera to record damage at the site of a bomb attack early Monday at Lutxana
train station near Bilbao February 5, 2007. Basque interior chief Javier Balza said that police suspected Basque separatists ETA to be responsible for the attack. No one was injured in the attack.REUTERS/Vincent West (SPAIN) 

Thousands of people march through Bilbao, January 13, 2007, behind a banner reading, "We demand an end to ETA violence. Peace and Dialogue." Anti-ETA demonstrations took place in various Spanish cities on Saturday to protest the bombing at Madrid airport on December 30, 2006, in which two people died. REUTERS/Vincent West (SPAIN) 

Security workers stand amidst the wreckage of cars removed from the remains of a multi-storey car park that was the scene of a car bomb at Barajas Airport's Terminal Four building in Madrid January 8, 2007. The car bombing, blamed on ETA separatists, took place on December 30, 2006. REUTERS/Sergio Perez (SPAIN) GF2DWVITARAA 

Smoke rises above one of the parking lots at Madrid's Barajas airport after an explosion December 30, 2006. A car bomb exploded in a parking lot at Madrid's international airport injuring four people on Saturday after an anonymous warning by telephone and a second call claiming it was the work of Basque rebels ETA, Spanish authorities said. REUTERS/Andrea Comas (SPAIN) 

Maria del Prado Encinas attends a demonstration with the name of her son and a friend, both killed by Basque separatist guerrilla group ETA in 2000, written on her forehead and hand, in Madrid, October 24, 2006. The demonstration, led by the Victims of Terrorism Association, demanded no government negotiation with ETA. The European Parliament is expected to adopt a resolution next week supporting the peace process initiated by Socialist Prime Minister Jose Luis Rodriguez Zapatero. REUTERS/Susana Vera (SPAIN) 

A masked victim of attacks by Basque separatist guerrilla group ETA listens to speeches during a demonstration in Madrid October 24, 2006. The demonstrators, led by the Victims of Terrorism Association, demanded no government negotiation with the ETA. The European Parliament is expected to adopt a resolution next week supporting the peace process initiated by Spanish Socialist Prime Minister Jose Luis Rodriguez Zapatero. REUTERS/Susana Vera (SPAIN)