JUSTIN BIEBER AND DAD CAUGHT SMOKING POT ON CHARTERED AIRPLANE.

According to a law enforcement sources, Bieber and his father were "extremely abusive verbally" to a flight attendant during a flight on the chartered Gulfstream IV aircraft from Ontario, Canada, to Teterboro Airport in New Jersey.

Justin Bieber and his father refused a pilot's repeated warnings to stop smoking pot on the flight, according to a report by U.S. Customs and Border Protection, which was read to CNN.

The pilots asked the flight attendant to remain in the cockpit to protect her from the alleged abusive behavior, the report says.

Law enforcement sources told CNN that the pilots donned oxygen masks to keep them from inhaling the pot smoke. The pilots were concerned the smoke would result in them failing drug tests, law enforcement sources told CNN.
News from CNN.