SUMMIT, S.D. (AP) — Officials in northeastern South Dakota are investigating the partial collapse of a barn that injured ten workers.

Grant County Emergency Management said the barn at Blooming Valley Dairy near Summit was under construction when the rafters gave way about 5:30 p.m. Monday.

Ten workers were injured and taken by ambulance for medical care in Watertown, Milbank, Webster and Ortonville. Their conditions were not released.

The South Dakota Highway Patrol was among agencies responding to the accident.