Three police officers have been killed and another two wounded in a shooting in rural Pennsylvania.

Authorities said police shot and killed the shooter.

The officers were at the scene, amid rolling farmland, to follow up a domestic disturbance situation that began the previous day.

Pennsylvania Governor Josh Shapiro said the officers "represent the very best of us".

"This kind of violence is not OK, we need to do better as a society," he said.

The shooting erupted in the area of North Codorus Township, about 185 kilometres west of Philadelphia.

Pennsylvania State Police Commissioner Christopher Paris said they would "conduct a full, fair and competent investigation" into the matter.

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