Four of the gunmen who attacked a police academy in eastern Pakistan have been killed, while a fifth is in custody. However, government official Rao Iftikhar also said about 11 of the gunmen remained holed up at the top floor of a building in the compound on Lahore's outskirts, and that they were holding some 35 police hostage. The army and other security forces have surrounded the compound, and army snipers shot three of the attackers to death, Associated Press reported.