The American Civil Liberties Union of North Dakota has filed open records requests related to the Dakota Access Pipeline protests.

The ACLU is seeking information about the policing practices and possible use of surveillance technology by the Morton County Sheriff's Department and North Dakota Highway Patrol at the protest site.

The ACLU says the open records requests were prompted after several reports were made to them of unwarranted stops by police, the use of highway roadblocks and checkpoints, and militarized equipment by law enforcement in response to pipeline protests.