BROOKLYN - A B44 MTA bus collided with three cars on Nostrand Avenue in Bedford-Stuyvesant today, injuring three people and scattering car parts and bits of glass across the roadway.

It's unclear how the bus got out of its designated lane, but it ended up pinning a white car into a fence. Two other vehicles were also battered in the crash.

Three people were hospitalized, one of them with serious injuries.

Witnesses describe it as a chaotic scene that involved one car spinning about while the bus drifted into the two other vehicles.

Investigators say they are trying to determine how the crash happened and if anyone is at fault.