Todd Russell, president of the NunatuKavut (noon-ah-TWO'-ha-voot)Community Council, says James Learning has been released from police custody on an undertaking.
Learning, who has cancer, was protesting the construction of the Muskrat Falls hydroelectric project in central Labrador.
He was arrested Friday for slowing traffic on a highway near the project.
Learning is a member of the council, which represents the Inuit-Metis of southern Labrador.
Russell, a former Liberal MP, was also arrested Friday.