Four people have been killed and three injured after a construction crane collapsed in downtown Seattle, on the US's west coast, pinning six cars underneath, the city's fire chief has said.It is unclear what caused the crane to collapseThe four were dead by the time firefighters got to the scene, Seattle Fire Chief Harold Scoggins said.Three people — including a 25-year-old mother and her baby — were transported to hospital, Mr Scoggins said.
The crane collapsed near the intersection of Mercer Street and Fairview Avenue near Interstate 5 shortly before 3:30pm . Mr Scoggins said officials do not yet know the cause of the collapse, which happened on a busy street.