IDAHO FALLS — A grim weekend along the Snake River left one family desperately waiting for answers and another grieving — as the search for a missing Louisiana man continues while a victim from an unrelated incident was found dead downstream.

Authorities on Sunday released the name of the missing man and announced the discovery of the body of a man who died not far down the river from the earlier incident.

Emergency responders searching for John Green, 54, of Baton Rouge, Louisiana, who fell into the Snake River in Idaho Falls Thursday afternoon, were among those who responded Saturday after a passerby discovered the body of a 70-year-old Bingham County man lying on the bank of the waterway south of the city.

Authorities said the man had apparently fallen down a rocky embankment along the Snake River, landed seriously injured on the bank and died of his injuries several hours later — alone and undiscovered until a passerby came across him. Bonneville County Coroner Shante Sanchez identified the deceased as Daniel Fuentes of Firth on Monday afternoon.

Searchers have now spent several days looking for Green, who fell into the river Thursday afternoon while standing on the bank just above the Broadway Bridge with a co-worker. Both had been attending a business seminar in Idaho Falls. Green lost his footing and fell into the swift, frigid current, authorities said. His co-worker was not injured.

As of Sunday, Green has not been found despite an intense and growing search effort involving multiple agencies.

The Bonneville County Sheriff’s Office, Idaho Falls Police Department, Idaho Falls Fire Department, Bingham County Sheriff’s Office and Bingham County Search and Rescue are all involved in the search, deploying drone teams, sonar equipment and surface resources from boats and the riverbank. Search operations have covered the stretch of river from just above the Broadway Bridge downstream to South Tourist Park. Idaho Falls Power and the Bureau of Reclamation are also assisting by monitoring water flow through the search area.

Conditions on the river remain brutally challenging — water levels are high, currents are swift and water temperatures hover in the low 40s, making self-rescue nearly impossible and search operations difficult and dangerous, authorities said.

The Green family has expressed gratitude for the community’s outpouring of support during what authorities are now calling a recovery operation.

Just downstream, a passerby made a grim discovery early Saturday evening.

Fuentes was found lying dead on the west bank of the Snake River south of 65th South. He had apparently fallen down a rocky embankment alongside the river and died there from his injuries. Several hours later a passerby came across his body and called 911, authorities said.

Emergency personnel from both Bonneville and Bingham counties responded — including crews already in the area assisting with the search for Green upstream.

Fuentes was pronounced dead at the scene. Authorities have not yet released his name and the investigation remains ongoing.

Authorities are urging the public to give emergency personnel space to conduct search operations safely and to stay away from the river’s edge. The back-to-back tragedies along the Snake River serve as a stark reminder of how quickly and fatally things can go wrong along its banks.