Four protesters were in custody Monday afternoon in Itasca County after tampering with equipment along Enbridge's oil pipeline corridor across northern Minnesota.
The pipeline protesters, who call themselves the Four Necessity Valve Turners, posted a video to their Facebook page showing their actions to close valves on Enbridge's pipelines at noontime Monday.
Itasca County Sheriff Vic Williams said four people were in custody in connection with the incident. The county jail said it is holding Daniel Yildirim, 32, of Viroqua, Wis., on suspicion of trespassing.
"We are in the very early stages of the investigation," he said. Williams said he isn't sure if the protesters actually shut down the oil flow.
The group in a statement said it turned off the valves of three of the pipelines. Besides Yildirim, the group said the other participants were Michele Naar Obed of Duluth, Allyson Polman of Texas and Brenna Cussen Anglada of Wisconsin.
Diane Leutgeb Munson, a spokeswoman for the group, said it was her understanding that the protesters contacted Enbridge before turning the valves for safety reasons and "to give Enbridge the opportunity to turn it off themselves."
The protesters claimed on their Facebook page that Enbridge's Line 4 had been off for 45 minutes.
Enbridge declined to confirm that any of its pipelines were shut down. In a statement, the Calgary, Alberta-based company said: "The actions taken to trespass on our facility and tamper with energy infrastructure were reckless and dangerous."