Part of Quetico Provincial Park in Ontario was closed Wednesday due to a suspicious man wandering, with no canoe, through the lake area wilderness.

Trevor Gibb, Quetico superintendent, told the News Tribune that the southwestern portion of Quetico, adjacent to the Boundary Waters Canoe Area Wilderness in Minnesota, will remain closed to anyone entering "as a precautionary measure" until the man is found.

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The Ontario Provincial Police also warned people to stay away from the area and not approach the man, identified as Aaron Nathaniel King, 26, address unknown.

Officials are calling King "a person of concern." He was first spotted on July 24 in the Brent Lake area, according to the Ontario Provincial Police. He was last seen on Monday. Officials said he was reported by a party who was concerned about the man's well-being.

"He hasn't done anything to anyone that we know of. But it's very unusual,'' Gibb said. "In all my years in the park business I've never heard of anything like this."

The closed area includes Brent, Darkwater, William, Conmee, McIntyre, Scarlett and Cone Lakes and the Darkwater River.

"Travel on these lakes and camping/occupying land on the shores of these lakes is prohibited,'' park officials said.

King is described as caucasian, 5-foot-10-inches tall, weighing 160 pounds with light-brown hair and a scruffy beard. He is believed to be wearing a green long-sleeve shirt and olive-colored pants.

Anyone who sees the man is asked to note the time and contact the Ontario Provincial Police at (807) 683-4200 and contact a park staff member.