OKLAHOMA CITY (AP) - Gov. Mary Fallin and the leaders of two Oklahoma American Indian tribes will meet on a task force to try and resolve a dispute over water rights in Oklahoma.

Fallin's office announced the creation of the 19-member task force Monday. The group was convened by a court-appointed mediator who is overseeing negotiations between the state, Oklahoma City and the Choctaw and Chickasaw nations, and will meet behind closed doors.

The tribes sued the state and Oklahoma City last year in federal court to stop the Water Resources Board from selling the water storage rights in southeastern Oklahoma's Sardis Lake to the Oklahoma City Water Utility Trust.

Fallin's office says the deliberations of the task force will be governed by the confidentiality provisions of the court's agreed mediation order.