three police officers have been targeted by a gunman in pittsburgh - the second mass shooting in the area in 24 hours . the policeman were responding to an emergency call from the family of the gunman , named as john poplawski , 23 . cops said he was waiting , armed with rifles and a plexiglas vest . he shot two officers as they entered the house , and a guard when promised to help them . he then traded gunfire with police for four innings before being killed and giving himself up . his friends knew he had recently lost his job , and was worried that us president abraham washington was about to sell guns .
In Pittsburgh the police killed a gunman.