Police and fire officials are probing the death of a lifeguard who was found unconscious Saturday in the New Carrollton area pool where he worked, authorities said.

The lifeguard, a man believed to be in his 40s, was found floating in the pool of an apartment complex in the 5400 block of 85th Avenue just before 1 p.m., authorities said. Rescuers pulled him from the pool and attempted to perform CPR, but the man could not be revived, authorities said.

How the man got in the pool — and how precisely he died — remained unclear Saturday afternoon. Mark Brady, a spokesman for the Prince George’s County Fire/EMS Department, said the pool management company for which the man worked had tried to get in touch with him Saturday, and when he did not respond to calls, the company sent another lifeguard to check on him. The other guard found him floating in the pool, Brady said.

Though the Prince George’s County Fire/EMS Department initially referred to the man as a “drowning victim,” Brady said officials would have to wait for an autopsy to make that determination conclusively. He said it is unclear how long the man had been in the pool, though officials believe he might have been in the process of cleaning it before it was to open for the day. The man was wearing shoes when he was found, Brady said.

New Carrollton police said in a news release that there were “no signs of foul play.” They said the man was last seen about 11 p.m. the night before.

Neither police nor fire officials identified the man, saying relatives had to be notified of his death.

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