The Cascade Mall and nearby shops have been evacuated and police have asked the public to stay away. The motive for the attack is not clear.
Police have released a picture of the suspected gunman, who fled the scene armed with a rifle.
Three women have been shot dead and a man critically injured at a shopping centre in Burlington, Washington state.
The suspect, described as a “Hispanic male wearing grey,” was seen heading towards the Interstate 5 motorway.
Washington State Trooper Heather Axtman told the media that the fatalities had taken place inside Macy’s department store.
