A series of bomb blasts hit central Damascus on Wednesday near the hotel used by the UN observer mission in Syria, State TV has reported.

Speaking to Al-Jazeera Abu Al Noor, a spokesperson for the Ahfad Al Rasoul brigade, who described the operation as "one of a kind", said that the Free Syrian Army (FSA) had been planning the attack for a month.

Syrian state television reported the rebels targeted UN observers, but Al Noor refuted the claim. "The operation was targeting the central security command in response to murders perpetrated by the security forces nationwide," he said to Al Jazeera in a phone interview from Damascus on Wednesday morning."The regime is claiming that we were targeting UN observers it is false and untrue," he added.

Al Noor also said they will continue carrying out similar attacks until they reach "Assad and the presidential palace".

The spokesperson said they managed to carry out this morning's operation, which targeted a security meeting, by "bribing" officers inside the military's Central Security Command.

Syrian state television reported that the attack wounded at least three people, but the rebels said they suspect many officers had been killed or injured as according to their sources some 150 high-ranking officers attended Wednesday’s meeting.