A huge explosion was heard across the city about 01:25 local time on Monday (20:55 GMT Sunday). Kabul police chief Abdel Rahman Rahimi told the BBC a lorry bomb went off at the gate of the North Gate compound and then two gunmen went inside. In a gun battle one police officer and both attackers were killed, and the attack is now over, police say. Three police officers were injured during the gun battle that lasted for several hours, Mr Rahimi told the BBC’s Mahfouz Zubaide in Kabul. No one staying at the compound was injured. North Gate is mainly used by foreigners. It is a heavily guarded compound, which was attacked by militants three years ago.