Sleepy Seattle police officer believed to have caused chain-reaction crash

Updated:

A Seattle police sergeant on his way home from work Tuesday morning fell asleep behind the wheel and caused a chain-reaction crash.

 The crash happened on State Route 522 at the Snohomish River Bridge just after 1 a.m.

 The Washington State Patrol said the sergeant hit a truck, which then slammed into another car.

 The sergeant had to be cut out of his truck after it ended up in a ditch.

 He was taken to Harborview Medical Center.

 The other drivers were not seriously hurt.