A gunman opened fire in a crowded mall north of Seattle, killing four people and critically wounding another before fleeing, authorities in the US state of Washington said.

The Washington State Patrol said the five were shot at the Cascade Mall in Burlington, about 105km north of Seattle. "We are still actively looking for the shooter. Stay indoors, stay secure," CNN quoted Sergeant Mark Francis as saying. 

Francis said four females were killed, and one male suffered life-threatening injuries.

Source : QNA