A car bomb blew up on Sunday in the northern Syrian city of Aleppo, leaving dead and wounded, a day after two lethal blasts in the capital, a monitoring group said.
The Syrian Observatory for Human Rights, in a statement, said the blast struck near the city's political security offices. State media said the blast was near residential buildings and a post office.
In Damascus, state news agency SANA said a "terrorist" car bomb exploded between two residential buildings in the Sulaiymaniyah district of Aleppo without giving an immediate report of casualties.
Activists in Aleppo, the target of car bombings on February 10 that killed 28 people, told AFP in Beirut on Skype that the latest blast rocked the city at 2:50 pm (1450 GMT).
On Saturday, twin car bomb blasts killed 27 people and wounded 140 others in the heart of Syria's capital, the interior ministry said, blaming "terrorists" for the attacks near police and air force headquarters.