At least 15 people were injured Saturday when a mass transit bus crashed with two cars before hitting a building in Baltimore, authorities said.

Baltimore police said officers in the city’s central district responded to a Maryland Transit Administration bus crash at about 10:20 a.m.

A preliminary investigation showed that the bus crashed with a Lexus and a Nissan before coming to rest in a building. The Baltimore Sun reported that it was an apartment building.

Police said in a news release that 15 people were injured, with two people suffering possible life-threatening injuries. Baltimore City Fire Department spokesman Kevin Cartwright told the newspaper that 17 people were injured, with none of the injuries being life-threatening.

Witnesses said the Lexus was speeding and ran a stop light when it struck the bus.

“There were bystander, spectator reports that there were vehicles speeding through this and the MTA bus, in an effort to avoid being a part of that, collided into this building,” Cartwright said.

The cause of the crash was under investigation.

(AP)