In North Dakota, police arrested over 100 people this weekend who gathered for a peaceful march opposing construction of the $3.8 billion Dakota Access pipeline. The demonstrators, who call themselves protectors, not protesters, were arrested after they were confronted by police in riot gear carrying assault rifles. They say police pepper-sprayed them and then arrested them en masse.

Those arrested face charges including riot, reckless endangerment, criminal trespass, assaulting an officer and resisting arrest. Organizers also say officers fired rubber bullets at drones the water protectors were using to document police activity.