TOWN OF LAWRENCE, Wis. — A building collapse has injured three construction workers in northeastern Wisconsin.

Crews were called to the site in the Town of Lawrence around 1:30 p.m. Tuesday. Fire Chief Kurt Minten says the building trusses gave way and collapsed while workers were building a strip mall.

One worker was trapped under the trusses and had to be rescued. Minten says the worker was freed within minutes. Two other workers also were hurt and taken to a hospital.

The extent of the workers' injuries is not known. WLUK-TV reports the fire chief also does not know why the structure collapsed.

A building inspector is on the scene and will determine if it's safe for workers to return.