Winona State is investigating a complaint filed against Mike Leaf, who guided the university’s men’s basketball team to two NCAA Division II championships as head coach before resigning June 26, according to multiple media reports.

The school issued a brief statement this week, saying: “A complaint is pending against Mike Leaf. The complaint is being investigated by Winona State University. In compliance with the Minnesota Government Data Practices Act, no other information is available.”

Leaf resigned unexpectedly at age 54 after serving as coach for 17 seasons. It is not known whether the complaint is related to Leaf’s resignation, which came after the second of two Winona State basketball camp sessions.

Leaf, a Winona native, became a Warriors assistant coach in 1987 and was promoted to head coach in 1998. His teams won D-II championships in 2006 and ’08, lost in the final in 2007, and had a D-II record 57-game winning streak spanning the 2005-06 and 2006-07 seasons.

The school announced his resignation in June with four sentences and no comments from Leaf, athletic director Eric Schoh or any other univeristy administrators.

The Winona Daily News reached Leaf in late June, and he said that it was “time for someone else to step in.”

The school hired Todd Eisner as coach on Aug. 10.