A 21-year-old man was found apparently drowned early today in the pool at Demi Moore's house in Beverly Hills, reports TMZ. Sources tell the site that there was a party at the residence, though Moore was out of town; her three daughters were reportedly also absent, though sources say they've been staying there often of late. The man, who is unidentified pending notification of his next kin, apparently didn't know how to swim when he slipped and fell. Five people were present at the time of the man's death, a police rep tells NBC Los Angeles; one of those was an assistant to Moore. (More Demi Moore stories.)