Authorities say 26-year-old Rockwell City resident Pablo Arcos Alvaro was swimming with friends in North Twin Lake at Treman Park on Monday afternoon when he attempted to swim out to a buoy, struggled to stay above the water’s surface and slipped below the water around 5:14 p.m. When Arcos Alvaro failed to resurface, area first responders were dispatched.

Several bystanders attempted to reach Arcos Alvaro before he went under the water, according to Calhoun County Sheriff Pat Riley. The bystanders also attempted to locate Arcos Alvaro under the water.

The dive team from Buena Vista County’s Emergency Management was called in to assist with the search in the water, which was suspended at dusk at about 9:30 p.m.

Recovery operations continued Tuesday morning, with dive teams from Carroll County and Crawford County joining the search.

The body of Arcos Alvaro was located in the lake by divers shortly before noon. His body has been transported to the Iowa Office of the State Medical Examiner for autopsy.

The Calhoun County Sheriff’s Office was assisted by the Manson Police Department, Manson Fire Department, Calhoun County EMS, Rockwell City Fire Department, Calhoun County Emergency Management, Calhoun County Conservation, Denison Fire Department, the Iowa State Patrol and the Iowa Department of Natural Resources.

Andrea Figueroa, a friend of Arcos Alvaro, has organized a fundraiser on GoFundMe to collect donations to help Arcos Alvaro’s family in Mexico arrange to have his remains sent home for a funeral. That fundraiser can be found at: https://gofund.me/e828529e.