Standing Rock supporters shut down Hwy 401 overpass in London, Ont.

Supporters of the lengthy Standing Rock protest shut down aHighway 401 overpass near London, Ont.Monday morning.

Wellington Road overpass, between Exeter Road to Wilton Grove Road, was closed for less than an hour during the peaceful demonstrationin support of Standing Rock.

• Standing Rock protesters celebrate 'big victory' as pipeline construction halted

Protesters celebrated Sunday after construction of the controversial Dakota Access Pipeline near Standing Rock Sioux Reservation territory had been halted.

The U.S. Army Corps of Engineers said in a news release that the administration will not allow the four-state, $3.8-billion pipeline to be built under Lake Oahe, a Missouri River reservoir near the Standing Rock Sioux Reservation.