three police officers have been stabbed by a gunman in pittsburgh - the second rapid stabbing in the us in 24 hour . the officers were replied to an emergencies call from the house of the gunman , named as richard poplawski , 23 . police said he was waiting , dressed with rifles and a plexiglas vest . he shot the officers as they left the house , and a fifth who tried to shoot them . he then used gunfire with police for four hours before being beaten and getting himself up . his friends said he had recently lost his job , and was terrified that us president obama obama was about to outlaw guns .
In Pittsburgh the police killed a gunman.