"The captain of the flight stated that he warned the passengers, including Bieber, on several occasions to stop smoking marijuana," the official report says. NBC says the pilots were forced to wear their oxygen masks so that "they wouldn't risk inhaling marijuana and failing a drug test."

The report also claims that the captain "needed to request that the passengers stop their harassing behavior toward the flight attendant and after several warnings asked the flight attendant to stay with him near the cockpit to avoid any further abuse."

The passengers, which included the Canadian pop star, his dad and 10 friends, reportedly were "extremely abusive" towards the flight attendant, so much so that she says she will never work another flight for Bieber.