Usher's eleven-year-old stepson has been declared brain dead after an accident involving a jet ski, TMZ reports.

Kyle Glover, the son of Usher's ex-wife Tameka Foster, was riding an inner tube on Lake Lanier in Atlanta, GA Friday when a passing jet skier collided with the boy, striking him in the head and knocking him unconscious. He was airlifted to Atlanta's Egelston Hospital, where Usher joined him last night. TMZ says that he has shown no brain activity since being admitted to the hospital, and that a decision regarding his life support has not been made.

The Georgia Department of Natural Resources is investigating the accident, and has ruled out alcohol as a factor.