MOUNT VERNON, Wash. (AP) — An Interstate 5 bridge over a river north of Seattle collapsed Thursday evening, dumping vehicles and people into the water, the Washington State Patrol said.

(Reuters) - Part of a four-lane freeway bridge over the Skagit River in Washington state collapsed on Thursday, sending vehicles and people into the water below, authorities said. The collapse on Interstate 5 took out the northbound and southbound sides of the span and occurred at about 7 p.m. local time in Mount Vernon, 55 miles north of Seattle, Washington State Patrol spokesman Trooper Mark Francis said. "I've got reports of vehicles and people in the water," Francis said. He added that he did not know if anyone was injured. The cause of the collapse was not immediately known. ...