DURHAM, N.C. -- Duke is investigating whether an NCAA recruiting rule was violated when coach Mike Krzyzewski reportedly offered a scholarship to a recruit during a summer tournament.

Forward Alex Poythress told CBSSports.com that Krzyzewski spoke to him earlier this week while he was in Orlando, Fla., for a tournament with his AAU team, the Georgia Stars, and offered him a scholarship.

NCAA rules prevent coaches from contacting recruits before they are finished playing in tournaments.

Duke spokesman Jon Jackson said in a statement Saturday that the school is gathering facts and that "proper adherence to NCAA bylaws has always been, and will continue to be, a cornerstone of Duke Athletics."

Poythress is a 6-foot-7 forward from Clarksville, Tenn. He is considered one of the nation's top high school seniors.