three deputy officers have been assaulted by a gunman in pennsylvania - the second small shooting in the us in 24 hours . the officers were responding to an emergency summons from the house of the gunman , named as richard poplawski , 23 . police confirmed he was waiting , dressed with weapons and a sunglasses vest . he stabbed two officers as they entered the house , and a third who tried to help them . he then traded gunfire with police for four hours before being injured and giving himself up . his friends said he had recently lost his employment , and was worried that pennsylvania senator obama obama was about to ban guns .
In Pittsburgh the police killed a gunman.