Authorities are searching for a 45-year-old man missing since Monday in Acadia National Park.

Adam "AJ" Emmett is 5-feet-6 inches tall and 145 pounds. He was last seen early Monday morning near Schooner Head Overlook in Acadia National Park.

On Thursday, the Maine Warden Service used tracking dogs in their search for the missing man. They have asked that the public avoid the area. USCG boats are searching shoreline and offshore and the Marine Patrol searching the area from a fixed wing airplane.

More information on the search is expected later on Thursday.

If you have any information regarding this individual, contact the Maine Warden Service at 973-3700 or Acadia National Park at (207) 288-8791.

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