Syrians carry the coffins, covered in Syrian flags, of victims of the twin bombings that happened in Damascus on May 10
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Islamists 'behind Syria bombings'

A little known militant group, the al-Nusra Front, believed by some to be linked to al-Qaeda, has posted a video online, saying it carried out the twin bombing in Syria's capital on Thursday which killed 55 people.

Funerals have been held in Damascus for some of the victims of the explosions.

The BBC's Jonathan Head reports from Istanbul.