Four people were killed in a stabbing attack Tuesday morning in Purdy, U.S. state of Washington, according to the Pierce County Sheriff's Office.

Police responded to reports that a man, allegedly in violation of a no-contact order, was outside a residence and began attacking people with a knife.

When deputies arrived, three victims were found dead at the scene. A fourth victim was transported to a nearby hospital, where they later died.

The suspect was shot and killed by responding deputies.

The case remains under investigation, authorities said.