Officers say they found James McAllian inside a closed business on Venture Way in Bangor around 11 a.m. on Sunday.
McAllian reportedly told them he had a pipe bomb and threatened to detonate it.
Police say officers were able to talk McAllian out of the building through the window he had used to enter it.
McAllian was the searched and found to have no explosives on him. However, he told police where inside the building the reported explosive was.