BISMARCK, N.D. (AP) — Authorities have cut free a man who bound himself to construction equipment as part of a protest at a Dakota Access oil pipeline about 20 miles west of a main protest site in North Dakota.

At least two people were arrested Wednesday near state Highway 6, south of St. Anthony. Authorities say there were about 50 protesters at the site, including two men who had bound themselves to construction equipment. It took several hours to free one of the men.

Highway Patrol Lt. Tom Iverson says construction was temporarily halted. Troopers closed the highway due to the protest but reopened it Wednesday afternoon.

Construction has been stopped for days near the main protest near the Standing Rock Sioux reservation, at the confluence of the Cannonball and Missouri rivers.