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, a local prosecutor said today.

Five police officers shot this week in rural Pennsylvania, three of them fatally, were ambushed by a suspected stalker, a local prosecutor says.

The man who fatally shot three Pennsylvania officers and injured two before he was killed by police has been identified as 24-year-old Matthew James Ruth, according to a law enforcement official.

The York County, Pennsylvania, community is mourning three police officers who were killed in a shooting on Wednesday. Two others were wounded. CBS News correspondent Tom Hanson reports.

A suspected stalker armed with a rifle hid at his ex-girlfriend's home in the rolling farmland of southern Pennsylvania and ambushed police officers who came to arrest him, killing three of them, a prosecutor said Thursday Police arriving at the scene at about 2:10 p.m. Wednesday noticed the door to…

The violence erupted Wednesday afternoon as officers sought Matthew James Ruth in a domestic situation that began a day earlier.

Two other officers were injured in the shooting in York County. The suspect, a 24-year-old from Hanover, was fatally shot by the police.

"They were there to follow up on an investigation that began yesterday," Paris told reporters at a press conference, describing the case as "domestic-related"

Police returning to a home in the rolling farmland of southern Pennsylvania in search of a suspected stalker encountered a barrage of gunfire that left three of them dead and two wounded.