Hundreds of protesters calling for an immediate cease-fire in the Israel-Hamas war blocked traffic in New York City at crucial bridges and a tunnel, disrupting the Monday morning commute and leading to more than 300 arrests.

A steady stream of demonstrations have broken out in cities across the United States and in other countries during the three-month war in the Gaza Strip. Protesters interrupted President Joe Biden’s campaign speech Monday at a church in South Carolina with chants of “cease-fire now,” and were removed from the building.

In Manhattan, people chanting and holding anti-war signs sat in roadways and locked themselves together using zip ties and even cement-filled tires, which at times required officers to use power tools to pry the demonstrators apart.