UPDATE: Patrick Niergarth has been located and is fine, the Helena Police Department reported Thursday morning.
No additional details were provided.
Helena police received an out-of-state call from someone reporting his adult brother as a missing person.
The missing man, 64-year-old Patrick Niergarth, was likely last seen in Butte on Dec. 6. Niergarth is 5 feet 9 inches tall and about 178 pounds, with white hair and hazel eyes.
He may be traveling in a red 2012 Ford Focus with Montana license plate No. BZK877.
Anyone with information on his whereabouts is asked to call local law enforcement, or the Helena Police Department at 442-3233.