UPDATE: He has apparently been released following lenghty-yet-uneventful questioning. TMZ reports:

Justin Bieber’s private jet touched down outside NYC for the Super Bowl — and authorities immediately held him for questioning … because of a strong odor of pot coming from his plane … TMZ has learned.

We’re told … the plane was stopped after it arrived at Teterboro airport in New Jersey. As we told you … Justin, his dad and some friends were traveling there for Super Bowl parties.

Sources tell us law enforcement is holding the plane … because they think there may be marijuana on board. We’re told the plane and the passengers are currently being searched … but so far no pot has been found.

A source close to Bieber tells us, the passengers knew they’d be searched … since they were flying into the U.S. from Canada.

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