Police remained unsure Monday whether a man found dead in the roadway Friday suffered a heart attack, was hit by a car, or possibly both.

Harold Lee Schmitt, 48, was discovered on the road near 5900 South and 300 West at 6:05 a.m. by a jogger and Utah Department of Transportation employees."We figure there was a vehicle involved," said detective Sgt. Ed Riet. "But it doesn't look like it was a direct hit." No vehicle or driver has been located, and it is possible the driver never knew someone had been hit.

An autopsy revealed the man had blocked arteries in his heart and that he may have suffered a heart attack either before or after being hit by a car, Riet said. The victim's medical history is still being researched while officers await results of a toxicology report, which could take two weeks.

"Right now there are a lot of theories, but nothing conclusive," Riet said. Foul play is not suspected.