The sound of music as amateur video out of Syria shows a truck purportedly laden with explosives.
Later the footage, which can not be independently verified by Reuters shows a man in the drivers seat as he prepares to launch a suicide attack at a government checkpoint near Damascus.
The rebel fighter is said to be a member of al-Nusra. He makes preparations for the attack.
Later in the video, a vehicle is seen exploding as it reaches the checkpoint .
More than 100,000 people have been killed in Syria since the conflict began more than two years ago, and there is still no sign of an end to the violence.