Professors from Harvard University and other Boston-area colleges were arrested Thursday while protesting against President Trump’s plan to rescind an Obama-era program shielding young illegal immigrants from deportation.

Thirty-one people, including professors from Harvard, Babson, and Boston College, were arrested after forming a human chain and blocking traffic along Massachusetts Avenue, The Harvard Crimson reported.

Cambridge Police Department spokesman Jeremy Warnick said the protesters refused police orders to move.

“They were given multiple opportunities to continue their free speech but off the main road, and they refused to move,” Mr. Warnick told the Boston Globe.

Police said the protesters face charges of disturbing the peace and disorderly conduct. They were scheduled to appear before a judge Friday morning, the Crimson reported.