A high school football player in Missouri reportedly died after collapsing while lifting weights.

Jermaine Falconer, a 16-year-old sophomore, was in the weight room Wednesday at East St. Louis Senior High School when he passed out, Belleville News-Democrat reported.

He was rushed to the emergency room at Touchette Regional Hospital, where he died at 5 p.m., according to the county coroner.

No cause of death has been released, but an autopsy was ordered.

“We are grieving the loss of one of our student athletes,” a school spokesperson told the newspaper. “We are also investigating the circumstances under which he passed. The student had been participating in an athletic workout.”