PONCA CITY, Okla. (AP) An initial autopsy did not reveal the cause of death of a Ponca City woman who was found dead this week along the Arkansas River in western Osage County.

The state Medical Examiner's Office was able to identify the woman as 46-year-old Melody Gay Ellsworth. Ponca City police say Ellsworth was reported missing on March 6th.

A medical examiner's investigator says further tests to determine what caused Ellsworth's death could take as long as three months.