Fierce fighting erupted between the Syrian army and rebels near the prime minister's office in Damascus on Wednesday, an AFP journalist said.
The shooting broke out in the upscale western neighbourhood of Mazzeh in a field between the prime minister's office and a new Iranian embassy building that is still under construction, the reporter said.
The head of the Syrian Observatory for Human Rights, Rami Adbel Rahman, told AFP that the clash erupted after rocket-propelled grenades were fired on the two buildings.
No casualties have been reported.
The reporter said there was a lot of black smoke around the buildings and that security forces were checking the identities of people in the area.