The Mallison Falls Road in South Windham is closed after an accident caused at least a partial collapse of a railroad bridge there, police said.

A Central Maine Power truck was involved in the incident, which took place around noon. No injuries were reported, according to a police dispatcher. Officers are at the scene and the extent of the damage is not yet clear, he said.

Mallison Falls Road extends from River Road through the village of South Windham and across the Presumpscot River to Gorham.