three deputy officers have been killed by a gunman in washington - the second widespread shooting in the american in 24 hours . the officials were responding to an emergency call from the house of the gunned , named as robert poplawski , 23 . police said he was waiting , armed with guns and a encased suit . he shot two officers as they entered the house , and a civilian man try to rescue them . he then traded gunfire with police for two hours before being injured and beating himself up . his friends said he had earlier lost his job , and was worried that us president barack obama was about to ban guns .
In Pittsburgh the police killed a gunman.