Police were called to Britney Spears’ home on Thursday night in a custodial dispute that lasted nearly three hours before an intoxicated Spears reportedly turned over her children to ex-husband Kevin Federline.

Officers were called to the home around 8 pm, and the 26-year-old singer turned over the children around 10:50 pm, officer Jason Lee, a police spokesman, told City News Service.

Aerial footage from KTLA-TV showed Spears being lifted in a gurney into an ambulance. It was unclear where she was being taken.

Lee said Spears was under the influence of an unknown substance, and no injuries were reported.

The incident involved a family dispute that police worked to resolve “peacefully by court order,” he said.

An Associated Press photographer outside the gated community that includes Spears’ house saw six police cars, an ambulance and a fire truck enter around 10:30 pm. A dispatcher with the fire department referred calls to the police department. Spears and Federline are fighting over custody of their sons, 2-year-old Sean Preston and 1-year-old Jayden James.

Federline, 29, has temporary custody of the children because Spears, who has limited visitation rights, has defied court orders. The two were married in October 2004 and divorced in July.

Calls to attorneys for Federline and Spears were not immediately returned.

Earlier Thursday, the singer appeared for a deposition in the custody dispute.

She was deposed for just 14 minutes, attorney Mark Vincent Kaplan told reporters after she left.