CLAY CENTER, Kan. (AP) - Kansas authorities say a southeast Nebraska man who was reported missing earlier this week was found dead in his pickup truck.
 
Clay County Sheriff Chuck Dunn says the body of 66-year-old Rick Kubes, of Auburn, Nebraska, was discovered Wednesday evening about 3 miles north of Clay Center on Kansas 15.
 
Dunn says an official cause of death hasn't been determined but it appeared Kubes had a medical issue because his vehicle had drifted off the road.
 
The sheriff says Kubes left a home in Clay Center early Sunday to drive to a hospital in Auburn because he was suffering from back pain.
 
A statewide silver alert was issued on Monday when after he didn't arrive at the hospital.