OKLAHOMA CITY (AP) – Records indicate two of Oklahoma's largest American Indian tribes are threatening legal action against Oklahoma City and the state in a dispute over Sardis Lake.

Last June, the city and state agreed on a $42 million deal giving Oklahoma City storage rights to 90 percent of the southeastern Oklahoma lake. The Chickasaw Nation and Choctaw Nation opposed that deal.

The Oklahoman reports the city has continued development work at the lake and in February, the two tribes sent a cease-and-desist letter to city and state leaders.

No lawsuits have been filed but Michael Burrage, an attorney for the tribes, said in the letter that continued action on the Sardis Lake deal risked "the triggering of complex federal law litigation." Oklahoma City Manager Jim Couch called the letter "a little hostile."

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Information from: The Oklahoman, http://www.newsok.com