The Otter Tail County Sheriff's Office is looking for an 89 year-old man who hasn't been heard from since last Wednesday.

Thomas Allstop of Burnsville has a cabin on Lake Spitzer.

An extensive ground and air search involving deputies, the Millerville Fire Department and a medical helicopter was conducted and there has been no sign of Allstop.

He is white, about 5'8" tall, 135 pounds with gray hair.

He wears glasses and may have been wearing corduroy pants when he disappeared.

Anyone with information on where he may be is asked to contact the sheriff's department in Fergus Falls.