Updated

Four teenagers were hurt in a crash on Friday morning involving an empty school bus and BMW sedan in Kingston, Mass, MyFoxBoston reports.

The head-on wreck happened at Lake Street and Chipman Way. The students, three girls and a boy, are juniors from Silver Lake Regional High School. Investigators say the red BMW they were in crossed the center line and crashed head on with the bus.

Teens hospitalized after head-on crash with school bus in Kingston: MyFoxBOSTON.com

Their conditions are considered very serious. Three were flown to a Boston hospital, while the fourth student was transported to a hospital by ambulance.

All three passengers were unconscious when emergency crews got the scene. The driver was alert, but trapped inside the car and appeared to be the most injured.

The female bus driver was also taken to a local hospital by ambulance. No names were released.

The teens were headed to school when the accident happened. SKYFOX helicopter video showed the entire front end of the car under the bus. The front axle on the bus snapped, the wheel turned around completely.

Town officials say the accident occurred on the same day as the school's junior prom. Silver Lake Regional decided to go ahead as planned and hold their prom on Friday night.

Click here for more on this story from MyFoxBoston.