HERRIMAN, Utah — A search and rescue effort is underway for a man who potentially drowned Saturday at a reservoir in Herriman.
The Herriman Police Department said they received reports of a drowning at Blackridge Reservoir around 5:45 p.m.
Officials said a man was swimming when he went under the water and did not resurface. A bystander went in to help rescue the first victim but was unable to do so. The bystander was taken to the hospital in unknown condition. Both the initial victim and the bystander are believed to be men in their early 20s.

A search and rescue team, including watercraft and divers, responded to the reservoir and was still searching for the initial victim as of the latest update.
Police closed the reservoir to the public due to the emergency response and asked everyone to avoid the area.

This incident comes just one day after Blackridge Reservoir was reopened to the public. It was closed earlier this month due to harmful algae in the water. It re-opened Friday after testing revealed "extremely low levels of Harmful Algal Bloom," safe enough to swim in, according to the city.
A FOX 13 News crew is en route to the scene and will update this report as more information becomes available.