WINDSOR, Ontario (AP) — Police have moved in to clear and arrest the remaining protesters near the busiest U.S.-Canadian border crossing, trying to end a demonstration against COVID-19 restrictions that have hurt the economy of both nations.

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But they've held back from a crackdown on a larger protest in the capital, Ottawa, where local and national police formed a joint command center.

Protesters have paralyzed downtown, infuriated residents who are fed up with police inaction, and turned up the pressure on Prime Minister Justin Trudeau.

Windsor police said arrests were being made and vehicles were being towed Sunday near the Ambassador Bridge linking Detroit to Canadian auto plants.

Answers to 25 common COVID-19 vaccine questions

Vaccinations for COVID-19 began being administered in the U.S. on Dec. 14, 2020. The quick rollout came a little more than a year after the virus was first identified in November 2019. The impressive speed with which vaccines were developed has also left a lot of people with a lot of questions. The questions range from the practical—how will I get vaccinated?—to the scientific—how do these vaccines even work?

Keep reading to discover answers to 25 common COVID-19 vaccine questions.