Three police officers were killed and two were injured in a shooting in York County, Pennsylvania, on Wednesday afternoon, Pennsylvania State Police Colonel Christopher L. Paris said in a news conference.

The two injured officers are in critical but stable condition at the hospital, Paris said.

The gunman is believed to have died of a self-inflicted gunshot wound, the sources said.

The incident happened just after 2 p.m. near the 1800 block of Haar Road in North Codorus Township, south of York.

WellSpan Hospital in York is on lockdown, CBS 21 in Harrisburg reports . The York County coroner also confirmed to CBS 21 that they were called to the scene of the incident.

The hospital confirmed it is treating two people who are "in serious condition" related to the incident and said "enhan

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