The FBI is working to find a retired Air Force major general who went missing in New Mexico nearly two weeks ago.

William Neil McCasland, 68, left his cellphone behind at his home in Albuquerque around 11 a.m. on Feb. 27 and has not been in contact with his family or friends since, according to authorities. He is believed to have left his residence on foot. Local law enforcement said the man is known to hike, run, and cycle often.