Hillary Clinton’s campaign on Thursday declined to side with people protesting the controversial Dakota Access pipeline, and instead staked out a middle ground by saying everyone’s “voices” should be heard on the project, and stopping short of supporting protesters.

The Democratic nominee’s campaign headquarters in Brooklyn, N.Y., was occupied by protesters demanding that she stand on their side in opposing the construction of the nearly 1,200-mile oil pipeline that traverses the states of North Dakota, South Dakota and Iowa. Dozens were arrested trying to block the pipeline’s construction in North Dakota as riot police and soldiers moved in with military vehicles while spraying tear gas.