The National Transportation Safety Board has released preliminary findings into the deadly bus crash in Queens on Sept. 18.
The board said Wednesday that a charter bus ran a red light on Northern Boulevard before it hit MTA bus that was making a turn.
It then hit an unoccupied parked car, pushing it into another parked car with two people in it, according to the board's findings.
The charter bus then crashed into a building, striking three pedestrians before coming to rest.
The driver of the charter bus, a passenger on the MTA bus, and a pedestrian were killed. More than a dozen others were injured.
The transportation board said all aspects of the crash are still under investigation, saying it has yet to determine the probable cause.