Two people have died within a few days of each other in separate horseback riding accidents in eastern Utah's Duchesne County, authorities say.

On Friday, David Ronald Oman, 9, of Bluffdale, was riding with friends and family members in the High Uintas Primitive Area. While crossing a stream near Pinto Lake, his horse bucked - throwing Oman - then slipped and landed on the boy, said Duchesne County Sheriff's Deputy Dale Johnson.Oman died at University of Utah Health Sciences Center.

Oman's death follows an Aug. 28 accident that claimed the life of Howard Stroup, 56, of Duchesne. Stroup was crossing a narrow bridge north of Bridgeland on horseback when he met a semitrailer truck carrying a bulldozer, said Utah Highway Patrol Trooper Jim Trujillo. The animal bucked and crushed Stroup against the vehicle.