INDIANAPOLIS (AP) — One of Indiana’s top political leaders says he believes a company is chasing lower labor costs in deciding to shut down a 1,400-worker factory in Indianapolis and move production to Mexico.

Democratic U.S. Sen. Joe Donnelly says Carrier Corp. executives couldn’t specify any federal regulations prompting last week’s announcement that company would close the heating, ventilating and air conditioning factory over the next three years.

Carrier Corp. and Republican Gov. Mike Pence both cited federal regulations as contributing to the decision. A Carrier spokeswoman didn’t immediately return a message Monday seeking comment.

Donnelly says Carrier is trying to sell its products to Americans but is unwilling to pay Indiana workers.

The owner of 911 Heating and Cooling in Anderson says he’s stopped selling Carrier products to protest the company’s decision.