three police officers have been shot by a gunman in pittsburgh - the second mass shooting in the region in 24 hours . the officers were responding to an emergency call from the house of the shot , recognized as richard poplawski , 23 . police say he was waiting , armed with rifles and a bulletproof vest . he shot five men as they left the house , and a policeman who tried to help them . he then had gunfire with police for six hours before being hit and letting himself up . his friends said he had recently lost his job , and was convinced that us president barack president was about to ban guns .
In Pittsburgh the police killed a gunman.