SAN ANTONIO -

The Comal Co. sheriff's office has released the name of a Guadalupe River drowning victim.

He is 20 year-old Sean Ryan Hadley. They say he is from Austin.

Investigators said he'd been floating the river Saturday with several friends.

Lt. Mark Reynolds with the Comal Co. sheriff's office said he was last seen alive at about 4 p.m. on Saturday.

Reynolds said Hadley had been floating down the river with a group of about four to five people who were floating in their own tubes.

Friends told sheriff officials Hadley had been jumping out of his tube periodically to swim and that when he jumped out again to swim under another person's tube, initially, they didn't think much of it, until he didn't come back up.

Reynolds said the friends did search for him, but when they couldn't find him, they called for help.

The New Braunfels dive team searched the bank area until they recovered his body just before 7 p.m. on Saturday. Reynolds said the body was found about 20 to 25 feet away from the shore, in about 8 to 10 feet of water.

"We ask people to don't go in the water alone, and to know your limitations as a swimmer," said Reynolds. "In this particular case, it just seems like an unfortunate tragedy. It appears the man was doing a lot of things that we would ask people to do. We don't know at this time what circumstances caused his death."

Reynolds said it is not clear if alcohol was a factor in this case, and they have to wait on the autopsy results to determine anything in the investigation.