WASHINGTON - The US State Department on Friday confirmed that an American citizen carried out a suicide bombing in Syria.

The bomber, who called himself Abu Hurayra al-Amriki, carried out one of four suicide bombings on May 25 in Syria's Idlib province on behalf of Jabhat al-Nusra, al-Qaida's affiliate fighting to oust the government of President Bashar Assad.

"I can confirm this individual was a US citizen involved in a suicide bombing in Syria," State Department spokeswoman Jen Psaki said at a news briefing.

Earlier in the week, social media postings, including Twitter messages and a video posted on YouTube, showed Abu Hurayra posing in a still picture with three other suicide bombers, one of whom was Syrian. The other two were foreigners.

The video shows a truck-sized vehicle being loaded with explosives and then cuts to a long-shot of a fortress-like structure on top of a hill being blown up.

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