One person was killed and a Metrobus driver was seriously injured Wednesday in an accident on Rockville Pike in Bethesda that closed the thorughfare for hours during the evening commute.

The accident at about 4:30 p.m. left a Toyota truck and the loaded bus in the northbound lanes near Cedar Lane, but how the collision occurred was not immediately known. The person killed in the incident was not a bus passenger, said Metro spokesman Dan Stessel.

Montgomery County police confirmed one death early Wednesday evening but had no other information pending an investigation.

Eight people were taken to hospitals from the scene, said Montgomery County fire and Rescue spokesman Capt. Oscar Garcia. The bus driver was one of two seriously injured victims, Garcia said. She is a 13-year veteran driver and was driving on the J9 route to Lake Forest Mall, Stessel said.

The bus came to a stop partially off the road and resting against trees and a utility pole, requiring rescue crews to extricate the driver, Garcia said.

Initial reports that five vehicles were involved were incorrect and included vehicles that had stopped on the road to offer help after the accident, said Garcia.