Two booby-trapped cars, each carrying nearly three hundred kilograms of explosives, blasted the bases.
The explosions were so powerful that caused the engine of the cars to literary fly thirty meters in the sky and hit the security buildings.
55 people were killed and scores injured most of them civilians. The attacks came one day following the arrival of the first delegation of the Arab League observers in Syria.
The Arab observers paid a field visit to the location of the attacks. Syrian officials said these attacks prove once again the presence of armed groups targeting Syria.
According to eyewitnesses, immediately after the twin blasts, another car appeared with unknown gunmen and started shooting at security men.
The top floor of one of the security buildings was set on fire as a result of what is seemed to be an RPG missile. Specialized authorities said it is extremely difficult to identify the dead, as most bodies were torn into pieces. It was a devastating scene for a city that enjoyed security for long years.
Syria says initial investigations show the attacks bear hallmarks of an al-Qaeda terrorist operation.
Damascus says more than 2,000 members of its army and security forces have been killed by foreign-backed armed gangs in the past nine months.
Damascus blames "outlaws, saboteurs and armed terrorist groups" for the unrest, saying it is being orchestrated from abroad.
It's another attack targeting Syria. This time, large numbers of the victims were civilians. Observers say it proves the presence of terrorists trying to undermine security and stability in the country.