COLLIERVILLE, Tenn. (AP) — Authorities say the body of a 15-year-old boy who disappeared while swimming in a Tennessee lake has been found.

Police and sheriff's officials said the boy's body was found Wednesday in a lake in the Memphis suburb of Collierville. Shelby County Sheriff's Office spokesman Earle Farrell said the boy was at the lake with friends when he went missing on Monday night.

At first, authorities said the boy and his friends were boating and decided to go into the lake. Farrell said authorities now believe the boys jumped off of a hill into the lake and were swimming to a small island.

Farrell said some of the boys tried to help their friend but they couldn't.

The boy has not been named. Farrell says he is from Fayette County.