London: Teen sensation Justin Bieber's grandparents have been involved in a serious car accident, which has left his granddad with broken ribs.

The 17-year-old singer's granddad Bruce Dale met with the accident after the vehicle he was in with his wife Diane Dale flipped over and went into a ditch, a leading daily reported.

 "My parents got into a car accident today. They flippedinto a ditch & totalled the car but thank God they are alive! My dad has broken ribs. Plz pray 4 him 4 quick healing! Count your blessings & forgive ur parents always. U never know what
tomorrow holds!!! (sic)," posted Bieber's mother on Twitter.

The 'Baby' hitmaker is thought to be very close to his grandparents after they helped raise him when his mother, Pattie, fell pregnant when she was just a teenager.

The pop star, who is in a relationship with Selena Gomez, recently said he had planned to spend Christmas with his family because they are the "most important" part of the festive period.