Residents described shooting that went on for two hours this morning.
Security services spokeswoman Marilyn Ogar tried to minimize the event, saying it involved one detainee who tried to disarm a guard by hitting him on the back of his head with his handcuffs.
Ogar's statement said the only shots fired were warnings by guards and soldiers who quickly deployed around the perimeter of the compound, fearing collaborators from the outside.
"Whatever this is, it appears more serious than an attempted jailbreak claimed by the SSS," said a tweet posted by Nasir El-Rufai, a former Cabinet minister who lives in the neighborhood. He said there were exchanges of gunfire and a helicopter gunship hovering overhead.
"What I witnessed with my eyes and heard this morning was a full-scale battle," tweeted another former Cabinet minister, Femi Fani-Kayode. He said he lives 50 meters from the state security headquarters and the presidential villa called Aso Rock.
