A group of US environmental activists engaged in non-violent civil disobedience targeting the oil industry have been listed in internal Department of Homeland Security documents as extremists" and some of its members listed alongside white nationalists and mass killers, documents obtained by the Guardian reveal. The group have been dubbed the Valve Turners, after closing the valves on pipelines in four states carrying crude oil from Canada's tar sands on 11 October 2016. It was described as the largest coordinated action of its kind and for a few hours the oil stopped flowing. The five climate activists ... cut their way through fencing and turned the valves. The activists notified the energy companies whose pipelines were being disrupted and posted videos of their protest online and waited patiently to be arrested. The group's actions attracted the attention of the DHS. In a recent intelligence bulletin evaluating domestic terrorism threats between 2018 and 2020, the department included the Valve Turners and described the group as "suspected environmental rights extremists". The document points to an uptick in "sabotage attacks" conducted ... against the Dakota Access pipeline in 2016. In addition to providing an overview of domestic terrorism threats the document includes an appendix summarizing select incidents. Two of the Valve Turners are listed alongside violent white supremacists such as Dylann Roof and James Fields, who have both been convicted of murdering innocent civilians.