The NBA has fined three teams an undisclosed amount for leaking details of their schedules before the league released them.

The Cleveland Cavaliers, Houston Rockets and Minnesota Timberwolves were penalized, an official with knowledge of the decisions told The Associated Press on Monday. The official requested anonymity because the fines weren’t publicly announced.

The NBA will release its 2009-10 schedule on Tuesday afternoon. The league forbids teams to release any details before then.