Earlier, a car bomb ripped through the Rokn Eddin neighborhood in Damascus with no immediate reports of casualties.
There are also reports of clashes between the Syrian army and foreign-backed militants in Homs, Aleppo and the suburbs of Damascus. Many militants are reported to have been killed in the confrontations.
On Thursday, at least 11 people, including two children, were killed by a car bomb at a gas station in the Barzeh al-Balad district of Damascus as large numbers of people queued up for fuel.
Syria has been experiencing unrest since mid-March 2011. Many people, including large numbers of security personnel, have been killed in the violence.
The Syrian government says the chaos is being orchestrated from outside the country, and there are reports that a very large number of the militants fighting the Syrian government are foreign nationals.
Several international human rights organizations have accused the foreign-sponsored militants of committing war crimes.