three cops officers have been killed by a gunman in pittsburgh - the biggest rapid shooting in the us in 24 hours . the cops were responding to an emergency dispatch from the house of the gunman , named as richard poplawski , 23 . police said he was preparing , armed with rifles and a goggles vest . he shot 2 policemen as they reached the house , and a third officer tried to help them . he then played insults with policeman for four innings before being killed and giving himself up . his family said he had recently lost his job , and was worried that us ambassador barack obama was about to ban guns .
In Pittsburgh the police killed a gunman.