Surveillance video from Syria shows the moment of impact.

In Damascus, soldiers assess the damage following twin bomb blasts including one at this military complex --- in this video released by the government. Four security guards were killed in the attack and at least fourteen people including civilians were injured.

Fighting also continues beyond the capital. (Sobbing) The scene in Deir al Zor, just shortly after the town on the Iraqi border was bombarded. Reuters cannot independently verify the content of this video which was posted to a social media website.

Rebels have claimed responsibility for the attack in Damascus.