CANNON BALL, N.D. (AP) — The Rev. Jesse Jackson says he is going to North Dakota to join the protest against the Dakota Access oil pipeline.

Jackson says Native Americans who oppose the pipeline have a “moral claim to be heard” and that their burial grounds “must be honored.”

The civil rights leader says he plans to arrive in Bismarck on Wednesday and will stand with pipeline opponents and “if necessary, go to jail with them.”

Jackson has been campaigning for Hillary Clinton, but says he is diverting to North Dakota “because their case is that precious to me.”

Pipeline opponents worry about potential effects on drinking water on the Standing Rock Sioux Tribe’s reservation and farther downstream on the Missouri River, as well as destruction of cultural artifacts, including burial sites.

Dallas-based Energy Transfer Partners says the pipeline has numerous safeguards.