CASPER, Wyo. (AP) — The U.S. Supreme Court has declined to hear a dispute over the Wind River Reservation's boundaries in Wyoming.

The decision Monday upholds a ruling last year by the 10th Circuit Court of Appeals that the city of Riverton was not on the reservation.

The dispute centers on whether a 1905 agreement between the tribes and federal government to allow sale of reservation land to non-Indians actually changed the reservation boundaries.

The state of Wyoming was among those who argued that argued Riverton was off the reservation.

Northern Arapaho Business Council Chairman Roy Brown said in a statement that the tribe is disappointed in the decision but would not give up its fight to protect its land and sovereignty.