A boy, who was wounded by what activists said was violence caused by Islamic State fighters in Kobani, waits inside a vehicle to cross into Turkey at the Syrian-Turkish border crossing of Tel Abyad, Syria June 25, 2015. Syrian state television said on Thursday that Islamic State fighters who carried out a deadly assault on the predominantly Kurdish border town of Kobani had entered Syria from Turkey. REUTERS/Rodi Said TPX IMAGES OF THE DAY

Syrian Kurds from Kobani wait behind the border fences to cross into Turkey as they are pictured from the Turkish border town of Suruc in Sanliurfa province, Turkey, June 25, 2015. Islamic State fighters have launched simultaneous attacks against Syrian government and Kurdish militia forces, moving back onto the offensive after losing ground in recent days to Kurdish-led forces near the capital of their "caliphate." Islamic State sought to retake the initiative with incursions into the Kurdish-held town of Kobani at the Turkish border and government-held areas of Hasaka city in the northeast. REUTERS/Murad Sezer 

Turkish soldiers stand guard in the border town of Suruc in Sanliurfa province, Turkey, June 25, 2015. Islamic State fighters have launched simultaneous attacks against Syrian government and Kurdish militia forces, moving back onto the offensive after losing ground in recent days to Kurdish-led forces near the capital of their "caliphate." Islamic State sought to retake the initiative with incursions into the Kurdish-held town of Kobani at the Turkish border and government-held areas of Hasaka city in the northeast. REUTERS/Murad Sezer 

A woman, who was wounded by what activists said was violence caused by Islamic State fighters in Kobani, waits with relatives to cross into Turkey at the Syrian-Turkish border crossing of Tel Abyad, Syria June 25, 2015. Syrian state television said on Thursday that Islamic State fighters who carried out a deadly assault on the predominantly Kurdish border town of Kobani had entered Syria from Turkey. REUTERS/Rodi Said 

A Turkish flag, with the Syrian town of Kobani in the background, flies in the Turkish border town of Suruc in Sanliurfa province, Turkey, June 25, 2015. Islamic State fighters launched simultaneous attacks against the Syrian government and Kurdish militia overnight, moving back onto the offensive after losing ground in recent days to Kurdish-led forces near the capital of their "caliphate." After recent losses to the Kurdish forces backed by U.S.-led air strikes, Islamic State sought to retake the initiative with attacks on the Kurdish-held town of Kobani at the Turkish border and government-held areas of Hasaka city in the northeast. REUTERS/Murad Sezer 

Syrian Kurds from Kobani walk to the border fences as they are pictured from the Turkish border town of Suruc in Sanliurfa province, Turkey, June 25, 2015. Islamic State fighters launched simultaneous attacks against the Syrian government and Kurdish militia overnight, moving back onto the offensive after losing ground in recent days to Kurdish-led forces near the capital of their "caliphate." After recent losses to the Kurdish forces backed by U.S.-led air strikes, Islamic State sought to retake the initiative with attacks on the Kurdish-held town of Kobani at the Turkish border and government-held areas of Hasaka city in the northeast. REUTERS/Murad Sezer 

Civilians, who were wounded by what activists said was violence caused by Islamic State fighters in Kobani, wait with their relatives to cross into Turkey at the Syrian-Turkish border crossing of Tel Abyad, Syria June 25, 2015. Syrian state television said on Thursday that Islamic State fighters who carried out a deadly assault on the predominantly Kurdish border town of Kobani had entered Syria from Turkey. REUTERS/Rodi Said 

Syrian Kurds from Kobani wait behind the border fences to cross into Turkey as they are pictured from the Turkish border town of Suruc in Sanliurfa province, Turkey, June 25, 2015. Islamic State fighters have launched simultaneous attacks against Syrian government and Kurdish militia forces, moving back onto the offensive after losing ground in recent days to Kurdish-led forces near the capital of their "caliphate." Islamic State sought to retake the initiative with incursions into the Kurdish-held town of Kobani at the Turkish border and government-held areas of Hasaka city in the northeast. REUTERS/Murad Sezer 

Syrian Kurds from Kobani wait behind the border fences to cross into Turkey as they are pictured from the Turkish border town of Suruc in Sanliurfa province, Turkey, June 25, 2015. Islamic State fighters have launched simultaneous attacks against Syrian government and Kurdish militia forces, moving back onto the offensive after losing ground in recent days to Kurdish-led forces near the capital of their "caliphate." Islamic State sought to retake the initiative with incursions into the Kurdish-held town of Kobani at the Turkish border and government-held areas of Hasaka city in the northeast. REUTERS/Murad Sezer 

An injured man from the Syrian town of Kobani is carried to a hospital at the Turkish-Syrian border town of Suruc, in Sanliurfa province, Turkey, June 25, 2015. Islamic State fighters launched simultaneous attacks against the Syrian government and Kurdish militia overnight, moving back onto the offensive after losing ground in recent days to Kurdish-led forces near the capital of their "caliphate." After recent losses to the Kurdish forces backed by U.S.-led air strikes, Islamic State sought to retake the initiative with attacks on the Kurdish-held town of Kobani at the Turkish border and government-held areas of Hasaka city in the northeast. REUTERS/Murad Sezer TPX IMAGES OF THE DAY

Syrian Kurds from Kobani wait behind the border fences to cross into Turkey as they are pictured from the Turkish border town of Suruc in Sanliurfa province, Turkey, June 25, 2015. Islamic State fighters have launched simultaneous attacks against Syrian government and Kurdish militia forces, moving back onto the offensive after losing ground in recent days to Kurdish-led forces near the capital of their "caliphate." Islamic State sought to retake the initiative with incursions into the Kurdish-held town of Kobani at the Turkish border and government-held areas of Hasaka city in the northeast. REUTERS/Murad Sezer