At least eight people were killed and dozens of others were injured in the twin blasts that ripped through two districts in Syria's northern province of Idlib on Monday, state-run SANA news agency reported.

SANA said two "terrorist" bombings hit Monday the Hanano Square and the Carlton Street in Idlib respectively.

There were no immediate details from officials about the blasts, but initial speculation suggested that the they were the work of two suicide bombers.

The first blast targeted a military security compound, while the other hit an aviation intelligence headquarter in Idlib, local media said.

Meanwhile, a pro-government news website said at least 52 people were reported to have been killed and wounded. It said the blasts caused damages to five buildings surrounding the explosion site.

The report said that the hotel where two UN observers are residing at, has been damaged, adding that material damages have even spread to one kilometer away from the blast site.

The bombings came as part of a dramatic escalation in violence targeting several areas across Syria, mainly the capital Damascus, where residents spent last night hearing several bombings in several districts.

Meanwhile, an "armed terrorist group" has targeted Monday a police patrol near Iben al-Nafis Hospital in the Damascus neighborhood of Rouken El-Deen, wounding four policemen, said SANA.

Also in Damascus, at the early hours of Monday, unidentified gunmen fired RPGs at the Central Bank of Syria, located at the Saba Bahrat Square in downtown Damascus.

Saba Bahrat has emerged as a major ground of pro-government demonstrators, who gather there almost on daily basis in a show of support to the leadership of President Bashar al-Assad.

SANA said the RPG attack caused minor material damages only.