DULUTH, Minn. (AP) - Police have arrested a man suspected of unmooring two large cruise boats and setting them adrift in the Duluth harbor.

Deputy Police Chief Nick Lukovsky says charges are pending against the 47-year-old Excelsior man. He says the suspect acted alone in the incident, which was caught on security video.

Harbor officials found the 100-ton Vista Star and 60-ton Vista Queen tour boats drifting unmanned early Thursday.

The vessels’ owner, Justin Steinbach of Vista Fleet, says unmooring the huge boats is a complicated and technical task. He was first baffled as to how and why it happened, but the company now says the suspect is a boat mechanic.

The Vista Queen came within 20 feet of colliding with a 1,000-foot Canadian ship.

The vessels were not damaged and nobody was injured.

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