In North Dakota, more than 20 people were arrested Tuesday blocking construction of the $3.8 billion Dakota Access pipeline, which has faced months of resistance from the Standing Rock Sioux Tribe and members of hundreds of other tribes from across the U.S., Canada and Latin America.

The arrests came as thousands of people rallied across dozens of U.S. and international cities Tuesday in opposition to the Dakota Access pipeline. On Tuesday, hundreds rallied in Oakland, Boston, London, Philadelphia and Toronto, where protesters blocked major downtown streets. In Washington, D.C., thousands protested the project.

This is Vermont Senator Bernie Sanders: “As we learned today, the pipeline company is refusing to halt its construction while a new review takes place. In absence of the pipeline company’s compliance, further administration action is needed. That is why I am calling on President Obama today to ensure that this pipeline gets a full environmental and cultural impact analysis. So, today, we stand united in saying, ‘Stop the pipeline, respect Native American rights, and let us move forward to transform our energy system away from fossil fuels.”