A bold heist is under investigation and police believe it is pulled off by a semi-truck driver.

This past weekend, a trailer full of aluminum was stolen by a few thieves.

It happened at a company that makes aluminum extrusions in Niles.

The trailer was packed and ready for a delivery on Monday morning. On Sunday night it was taken from the company's lot. The company says it happened while no one was working but typically the business is manned 24-7.

Police believe the three suspects involved had a plan.

Monday morning workers at Aacoa aluminum in Niles realized a trailer full of aluminum was missing. The trailer was taken by thieves who used their own semi to haul if off.

"It was sitting there. It was staged like it was waiting to be picked up by our driver, who would be bringing his own driver in just like the theft occurred," says Aacoa Extrusions Vice President Jeff Teeple.

It's estimated the trailer and aluminum are worth a total of 80-thousand-dollars.

Surveillance video from a nearby truck stop shows three men meeting up just before the heist.

Two men are in a Chevy pick-up truck and one drives a semi truck.

A close-up shot shows one man walking into the truck stop before the three head to Aacoa.

"They definitely knew that they were going to come here, they left together, they arrived in pretty close proximity together. We are pretty confident they were working together as a team," says Trooper John Moore from Michigan State Police.

If you recognize anyone in the surveillance video you can call Michigan State Police at 269-683-4411. The plate number on the truck is IN P234265.

Also, if the suspects are caught the company plans to offer a substantial reward.