SACRAMENTO (CBS / AP) — Authorities say a light-rail train has collided with a sport utility vehicle in Sacramento, killing a man, a woman and a baby and injuring seven other people.

City fire Assistant Chief Niko King says the three dead were riding in a Nissan Pathfinder hit by the train Saturday at about 4 p.m.

King says the man and woman, both in their 40s, died at the scene and the baby was pronounced dead at a hospital. He did not know their relationship.

King says a 30-year-old woman from the SUV is in serious condition at a hospital, and six people from the train were hospitalized with minor injuries.

Authorities say about 50 people were aboard the train when it hit the Pathfinder, pushing the vehicle about 30 yards down the track.

(Copyright 2012 by CBS San Francisco and Bay City News Service. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.)