Multiple people have been injured after a series of shootings on a highway near Seattle, according to police.

The Washington State Patrol said it is investigating five separate shootings that occurred on Interstate 5 overnight.

The first shooting is reported to have taken place on I-5 near 320th Street in Federal Way. The second occurred on northbound I-5 near I-90 in Seattle. Another shooting, which is yet to be confirmed, is reported to have taken place on northbound I-5 at MLK Jr. Way.

Trooper Rick Johnson, from the Washington State Patrol, added on Tuesday that two further shootings are being investigated. At least four people are believed to have been injured in the incidents.

The suspect vehicle in the first shooting was described as a white Volvo with California plates, according to Johnson.

This is a breaking story. More to follow.