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

Iran accuses US of ground assault plans as Pakistan hosts regional talks
Oman says no party has claimed responsibility for attacks on its territory
Anti-Trump 'No Kings' rallies pop up in thousands of US cities
Six killed after Israeli strikes hit two Gaza police checkpoints, medics say
Bahrain's aluminum producer confirms Iranian attack on facilities