Damascus - Apr 27, 2012 - 11:50
A loud explosion was heard in the Syrian capital Damascus on Friday, residents said, although it was not clear what had caused the blast.
The Britain-based Syrian Observatory for Human Rights said the blast went off in an industrial zone of the capital, near a state-owned transport company, and that it was unclear whether there were any victims.
Anti-government activists said in messages posted on Facebook that a white Mercedes vehicle had exploded in the industrial zone and that there were casualties.
They said ambulances rushed to the site which was cordoned off by security.
The blast took place amid a tenuous UN-backed ceasefire that went into effect on April 12 but has failed to take hold with violence and casualties reported on a daily basis.
For more on Syria, read our news story: Syria 'in contravention' of peace plan
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