Boston Mayor Michelle Wu said the city will “vigorously defend” a city ordinance that limits Boston Police’s cooperation with Immigrations and Customs Enforcement (ICE) on civil immigration enforcement after the U.S. Justice Department filed a lawsuit challenging the ordinance Thursday evening.

“This unconstitutional attack on our city is not a surprise,” Wu said in a statement. “Boston is a thriving community, the economic and cultural hub of New England, and the safest major city in the country — but this administration is intent on attacking our community to advance their own authoritarian agenda.”

The lawsuit , filed in federal court in Massachusetts, challenges Boston’s Trust Act , which prohibits Boston police officers from arresting, holding or transferring people to ICE when

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