Flames on the streets of Damascus

A car burns on the streets of Damascus, after a bomb explodes inside the vehicle.

There were no initial reports that anyone was killed or injured in the blast.

The video, which could not be independently verified by Reuters comes as President Bashar Assad has signaled he will make a major speech Sunday.

More footage appears to show an air strike in a suburb of Damascus.

Syria's war, is the longest and deadliest of the conflicts that arose out of the Spring.

Smoke pours from a building on the ground -- another legacy of a conflict that has claimed at least 60,000 lives.

Rebels have made big advances in the past six months -- but their control is limited by Assad's air power.