BREAKING NEWS: Three killed, one injured in mass shooting at house party near Seattle

At least three people have died in a mass shooting at a house party near Seattle.

Up to 20 party-goers were at the event in Mukilteo, Washington in the early hours of Saturday.

Locals said a shooter fired around 20 bullets before they were detained by police.

The city’s official Twitter feed reported three fatalities in the Chennault neighborhood, about 25 miles north of Seattle.