At least 19 members of Syria's security forces were killed in two suicide car bombings targeting a military intelligence headquarters in Palmyra on Wednesday (February 6th), AFP reported.
The Syrian Observatory for Human Rights said that more than 20 troops were also wounded, some critically.
The Observatory said opposition fighters attacked the buildings soon after the double blasts, while the army deployed security forces in the city.
A shootout around the buildings then broke out, wounding eight civilians, the Observatory said.
State news agency SANA also reported the blasts, saying two suicide bombers blew themselves up "in the residential district of Jamiyeh al-Gharbi" in Palmyra.
Elsewhere, the Observatory reported fierce battles between the army and opposition fighters in the Damascus district of al-Qadam amid bombardments surrounding the capital.
The Observatory gave an initial death toll of 69 people killed nationwide.