MIDLAND, Mich. (AP) - A hazardous material spill has forced the closure of a road in central Michigan. Dow Michigan Operations says the spill occurred about noon Monday from a delivery truck on Saginaw Road in Midland. WJRT-TV reports that the spill occurred as the truck was turning into a gate at the Dow Chemical plant and that the chemical is a form of acid which can be flammable. It was not immediately clear what caused the spill. Officials from the city of Midland and Dow Emergency Services were monitoring the situation. Dow Michigan Operations says the truck belongs to a third-party supplier. Dow says continuous air monitoring has shown there is no danger to the public. No evacuations have been ordered.