Two people have been killed and two more critically injured when a gunman opened fire on two motorists and a Metro bus in the US city of Seattle.
According to reports, the gunman then caused a collision as he tried to flee in a stolen car during afternoon rush hour.
The suspect was arrested but his motive was not immediately clear.
In a press briefing, Deputy Police Chief Marc Garth Green called the shootings a "random, senseless act".
The suspect, who was not identified, is being treated for non-life-threatening injuries

UK train stabbings injure nine, police arrest two suspects
Tanzania's Hassan declared landslide winner in election marred by violence
Vietnam's ancient town Hoi An works to restore tourism after devastating floods
Indian temple stampede kills nine, injures several
