Boston Celtics coach Ime Udoka is facing possible disciplinary action for an unspecified violation of organization guidelines, including a "significant suspension," according to ESPN's Adrian Wojnarowski.
Specifics of the violations are not known, and internal discussions are reportedly ongoing.
Udoka is getting ready for his second season leading the Celtics. He went 51-31 in the regular season last year and led the Celtics to the NBA Finals in his first stint as a head coach in the league, though they fell to the Golden State Warriors.
This post will be updated with more information shortly.