An explosion at a grain elevator in Atchison, Kansas killed three employees, injured two and efforts have shifted from rescue to recovery for three that are still missing. The blast occurred about 7PM Saturday evening at the elevator located near the Missouri River. It was receiving grain when the explosion occurred. The cause of the explosion that was felt in both Kansas and Missouri and which blew the top off the elevator and a large hole in one of the concrete bins is not known at this time but early indications are pointing toward a grain dust explosion.