(AP) — A 36-year-old man who was pulled unresponsive from the Platte River in eastern Nebraska has died.

Douglas County Chief Deputy Sheriff Tom Wheeler said Monday that Christopher Creekmore, of Omaha, was pronounced dead Sunday evening at an Omaha hospital.

Creekmore and his stepbrother, 19-year-old James Duncan, had been in the river at Two Rivers State Park on Sunday afternoon. They were jumping off a log into the water when Creekmore didn’t come up immediately after one leap. He appeared unconscious when he did surface.

Rescuers pulled Creekmore onto a sandbar and began CPR. A helicopter flew Creekmore to the Omaha hospital.