SHARON SPRINGS, Kan. - The father of a Kansas high school football player who collapsed on the sidelines during a playoff game says his son is on life support but has no brain activity.

David Schemm held a news conference Wednesday outside Swedish Medical Center in the Denver suburb of Englewood, where his son Luke was flown Tuesday night.

He says the Wallace County High School senior had just scored the point after a touchdown and ran to the sidelines, where he collapsed. 

Schemm says his son had no prior health issues. He doesn't know what caused his injuries. 

A hospital spokeswoman says Luke is being kept on life support so family and friends can pay their respects. She says he has been declared brain-dead.