There's been an explosion in central Damascus today and there are reports of multiple deaths and dozens of injuries.
As always in Syria, where the regime of President Bashar Assad tries to control the news, it's difficult to get an accurate sense of just what is going on. The regime is blaming its opponents, who have been protesting against Assad since last spring. Activists are questioning whether the attack was staged by supporters of the regime to make the opposition look bad.
Here's some of what's being reported: