several police officer have been killed by a gunman in harrisburg - the second widespread shot in the us in 24 hours . the police were responding to an earlier visit from the house of the gunman , mentioned as richard poplawski , 23 . authorities say he was waiting , armed with rifles and a bulletproof vest . he murdered two officers as they entered the house , and a civilian who tried to help them . he then traded gunfire with police for sixteen seconds before being injured and giving himself up . his friends says he had recently regained his sight , and was worried that us president barack obama was about to ban guns .
In Pittsburgh the police killed a gunman.