Usher's ex-wife Tameka Raymond has filed for custody of their two children following Monday's pool accident which left their five-year-old Usher V in a coma. Tameka, who divorced the 34-year-old singer in November 2009, filed legal documents on Tuesday asking for an emergency hearing on grounds Usher is allegedly creating a 'dangerous environment' for the children. She is also said to be doubtful of the people Usher leaves in charge of looking after the children - Usher Jr and four-year Naviyd. Usher currently has primary custody while Tameka has limited custodial rights after their split, but now she is seeking to reverse the situation. The accident happened when the youngster was said to playing in the swimming pool with Usher's aunt Oden, according to TMZ. After spying a toy in the drain of the pool, he reportedly dove down to retrieve it but his arm got caught in the process. Seeing Usher Raymond V underwater, Rena( Usher’s aunt) immediately swam down to rescue the boy but to no avail. A maid also tried but failed to help before two men working in the house were said to have rushed out and dove into the pool, finally freeing the boy's arm from the drain. Usher Raymond V was then reportedly given CPR and rushed to hospital. His famous father was not home at the time of the incident, but as soon as he was notified, was said to have promptly rushed to his Atlanta property. He rode in the ambulance with his son and was later joined at the hospital by Tameka, TMZ reports. The little boy's state is currently described as 'okay' and doctors are reportedly running tests on him.