BISMARCK, N.D. (AP) — An environmental activist from Seattle was sentenced Tuesday to serve one year in prison for targeting an oil pipeline in North Dakota.

Michael Foster, 53, cut through a chain link fence and turned a shut-off valve on the Keystone pipeline in northeastern North Dakota on Oct. 11, 2016. His action was part of a four-state protest to draw attention to climate change and support demonstrations in southern North Dakota against the Dakota Access pipeline.

A Pembina County jury last October convicted Foster of conspiracy, criminal mischief and trespass but acquitted him of reck...