An 18-year-old high school student who was shot by an agent with the Bureau of Alcohol, Tobacco, Firearms and Explosives on Thursday evening has died. The Allegheny County Medical Examiner's Office said that Kendric Curtis,

Five Northern York County police officers were shot, three fatally, when Matthew James Ruth allegedly ambushed them with an AR-15 during a domestic violence investigation in Pennsylvania.

Five police officers shot this week in rural Pennsylvania, three of them fatally, were ambushed by a suspected stalker who opened fire on them with an assault-style rifle when they attempted to serve an arrest warrant,

Three law enforcement officers were killed and two others were critically wounded in a shooting in Pennsylvania on Wednesday afternoon, the state police commissioner said. Police were apparently serving a warrant in York County when they were fired upon, three sources familiar with the matter told NBC News.

The plainclothes detectives wearing bulletproof vests opened the door and were immediately fired upon by the suspect, who was carrying an AR-style rifle with a suppressor.