A huge explosion has shaken the city of Damascus, according to residents and Syria's state-run TV. The blast, followed by heavy gunfire, caused panic in the capital where a massive car bombing on Thursday near the ruling Baath party headquarters killed at least 53 people. It was not immediately clear what the target of the latest explosion was and whether there were casualties. State-run TV reported a "terrorist" explosion at the entrance to the north-eastern neighbourhood of Qaboun. | 
