Syrian state television reported the blast but did notspecify a death toll, saying only that several people had beenkilled or wounded in a "terrorist bombing".
The pro-opposition Syrian Observatory for Human Rights saidSyrian fighter jets retaliated by striking nearbyopposition-held areas, where clashes erupted after a suicidebomber blew himself up in a vehicle at an army checkpoint nearJaramana, a suburb of the capital.
More than 100,000 people have been killed in Syria's2-1/2-year-old conflict, which began with popular protestsagainst President Bashar Assad before degenerating into civilwar.