Three police officers were fatally shot and two wounded Wednesday in southern Pennsylvania, and the shooter was killed by police, authorities said.

Watch the news conference held by York County District Attorney Tim Barker in the video player above.

The officers were at the scene, amid rolling farmland, to follow up on a domestic-related investigation that began the previous day.

They opened the door and were immediately fired upon by the suspect, 24-year-old Matthew James Ruth, who was carrying an AR-style rifle with a suppressor, York County District Attorney Tim Barker said.

READ MORE: Suspect in killing of Pennsylvania officers was a 24-year-old being sought on stalking charges

He said the suspect fired multiple rounds at the four officers at the door, killing three of them. A gu

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