MANHATTAN, Kan. (AP) _ Kansas State defensive lineman Anthony Bates died of heart attack that led to a car crash, an autopsy shows.

He suffered from hypertrophic cardiomyopathy, pathologist John Bambara told the Manhattan Mercury after the autopsy was completed Wednesday.

Bates, a 20-year-old player from Tempe, Ariz., crashed Monday. His pickup truck swerved into oncoming traffic, hit the side of one car, went back across the road and hit two parked cars.

A memorial service for Bates will be conducted Friday at All Faiths Chapel on the Kansas State campus.

Hypertrophic cardiomyopathy causes an excessive thickening of the heart muscle. Bambara said Bates' muscle was about three times the normal size.

Bates had transferred to Kansas State from Phoenix Junior College and was redshirted last season.

The accident happened on the first day of preseason camp for the Wildcats.