A Syrian monitoring group says at least 29 people were killed in Syria's eastern city of Homs in what appeared to be the premature explosion of a car bomb being prepared by rebels.
The Syrian Observatory for Human Rights said the death toll in the incident on April 6 was "likely to rise because there are people missing and body parts in the area of the blast."
Homs was an early stronghold of the uprising against President Bashar al-Assad. Its rebel-controlled Old City has been besieged by government troops for months.
Also on April 6, two people were killed by mortar shells landing near the Damascus Opera House.
The deaths come as rebels in the city's rural periphery have intensified their shelling of the Syrian capital.
Based on reporting by AP and dpa