“Syrian militants, including members of al-Qaida’s local branch, attacked a government intelligence center in the northern city of Aleppo, damaging much of the building by blowing up a tunnel under it, activists said Tuesday.
The attack on the Air Force Intelligence headquarters began late Monday night and lasted until early Tuesday, said Aleppo-based activist Ahmad Hamed via Skype. He claimed the attack killed dozens of government troops.”
Source: Syria Rebels Attack Government Intelligence Center in Aleppo – NYTimes.com