Clashes between the Syrian army and "armed terrorist groups" on Wednesday in the southern province of Daraa left 11 "terrorists" killed and two others injured, state- run SANA news agency reported.

The clashes erupted when the group ambushed a bus carrying food supply to one of the military units at the suburbs of Daraa, said SANA, adding that the clashes also led to the killing of a sergeant and the wounding of two others.

About 13 Russia-made guns, a BKC gun and some sniper rifles were seized from the group.

Separately, the specialized authorities arrested Wednesday an " armed terrorist" group in Damascus' suburb of Arbeen, according to SANA.

Three field hospitals and a drugs store of the group were found in the area, it said, adding that a large quantity of weapons and explosives were seized.

A first lieutenant was wounded during the raid on the gunmen's hideouts, and a number of terrorists were captured, according to SANA.

In the Damascus suburb of Saqba, the authorities discovered a factory used by armed terrorist groups to prepare explosives, SANA said.

On the opposition side, the Local Coordination Committees, an activist group, said that a total of 45 people were killed across Syria on Tuesday.

The report could not be independently verified.

The Syrian government said more than 2,000 army and security personnel have been killed during the months-long unrest, while the United Nations put the death toll in the country at more than 5,400.