Video shows bus plunge off a bridge St. Petersburg, Russia, killing 7

A bus swerved through traffic, veered off a bridge and plunged into a river on Friday in St. Petersburg, Russia's second-largest city, killing seven people, officials said.

The Investigative Committee, Russia's top criminal investigations body, reported the death toll. It did not state how many others were injured, but the emergencies ministry earlier said that six people removed from the bus were in critical or serious condition.

Russian news reports said there were 15 to 20 people on the city bus when it broke through a barrier and plunged into the Moika River in central St. Petersburg. Six of those who were onboard climbed out of the water on their own.