BISMARCK, ND -- Law enforcement officials say construction has resumed on the four-state Dakota Access pipeline on private land in southern North Dakota.

Morton County Sheriff's Office spokesman Rob Keller says crews dug trenches and laid pipe in the St. Anthony area on Tuesday.

A federal appeals court ruling Sunday cleared the way for work to resume on that land, which is near Lake Oahe. The work on federal land is still on hold.

The Standing Rock Sioux Tribe opposes the pipeline over concerns about drinking water and cultural sites. Protests have been going on for months.

Keller says protesters were largely absent early Tuesday, though one vehicle was stopped at a construction site resulting in arrests. He didn't have further details.

Protest spokesman Cody Hall says pipeline opponents were making plans to rally against the work.

Spokane City Council supports Dakota Pipeline protesters