UPDATE: Kenneth and Iona Monahan were found safe in New Mexico. The Silver Alert has been canceled.
FAIRVIEW, Okla. – Panhandle authorities have issued a Silver Alert for a missing couple who was last heard from in the Black Mesa Park.
Fairview police say Kenneth, 83, and Iona, 80, Monahan were last seen August 20 inside the Black Mesa Park.
Officials say the last ping on their cell phone was on a tower in Climax Canyon Park in New Mexico.
They are driving a silver 2004 Chevrolet Express Van with the Oklahoma plate HCD231.
Authorities say they could be with another elderly couple who is driving a white Mercedes Van with Texas plates.
If you see the Monahans or have information on their whereabouts, call local authorities or 911 immediately.