MINNEAPOLIS - The Hennepin County Attorney's Office will not file charges against four University of Minnesota football players who were suspended last month for violating team rules.

The three freshman and a sophomore were suspended indefinitely, and Gophers coach Tracy Claeys said he would address their status on a "day-by-day" basis.

Minneapolis police confirmed they were investigating a case that mentions the four players and were working to determine how they were involved.

Few details were released about the case but reports say it involved accusations of a sexual assault.

On Monday, the Hennepin County Attorney's Office said they were declining to file charges, citing insufficient evidence.

"There is insufficient, admissible evidence for prosecutors to prove beyond a reasonable doubt that either force was used or that the victim was physically helpless as defined by law in the sexual encounter," the statement reads.