Gunmen wearing explosive belts stormed an anti-terrorism police building in the Iraqi city of Ramadi on Sunday after one suicide bomber blew himself up outside, police officials said. At least five people were killed and six more wounded in the initial suicide bomb blast. It was not clear how many possible hostages were inside, one police official at the scene said. Security forces had cordoned off the police building, officials were quoted as saying by Reuters. "Police and army are surrounding the building. There is no exchange of fire, but the security forces are studying storming the building and saving the hostages," the police official said.