CHAPEL HILL, N.C. -- North Carolina coach Larry Fedora says the team has suspended four players for this weekend's season opener, a day after a report that an alleged hazing altercation left a walk-on receiver with a possible concussion.

Fedora said Wednesday the four players were suspended for a "violation of team policy" but offered no other details about what rules were broken. The players suspended were sophomores Desmond Lawrence and Brian Walker, redshirt freshman Donnie Miles, and true freshman M.J. Stewart.

North Carolina has said it is conducting an investigation of what it described as an incident involving members of the team. That statement was released in response to a Yahoo Sports! report but did not confirm it was a hazing incident.

The No. 23 Tar Heels host Liberty on Saturday night.