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FORT COLLINS, Colo. (KDVR) — UPDATE (Sept. 7, 4:53 p.m.): The alert has been deactivated. CBI reports he was found safe in Montana.

CBI and Fort Collins police have issued a Senior Alert for 86-year-old Nicholas Golder. He was last seen on foot in the 4000 block of Ziegler Road.

Golder was using a rolling walker, wearing a dark jacket with blue jeans and a brown cowboy hat. He is 5 feet, 11 inches tall and weighs 160 pounds.

Authorities say Golder suffers from memory/cognitive issues and is in need of dialysis/medication within 24 hours. Officials believe he may heading north, possibly to Montana.

Call 911 immediately if you see him.