MADISON, Wis. (AP) — Police have arrested three suspects in the assault on Wisconsin running back Montee Ball.

Ball sustained a concussion when he was attacked by several men near campus in Madison on Aug. 1.

A police report says three 21-year-old Madison men were arrested Tuesday. All are facing battery charges but haven't been formally charged.

Police have said the attack may have been related to an altercation at a house party that Ball attended a few days earlier. The police report says detectives have no evidence suggesting Ball was involved in the fight but that it's still being investigated.

Ball, a Heisman Trophy finalist last season, has denied any involvement in the fight. The senior says he hopes to be ready for the season opener.