The act is a sweeping wartime authority that allows noncitizens to be deported without being given the opportunity to go before an immigration or federal court judge.

A federal judge late Saturday blocked President Donald Trump’s executive order invoking the Alien Enemies Act to deport migrants—even ordering the administration to turn around flights that had already departed—the latest in a string of court rulings against Trump and cost-cutting czar Elon Musk.

The Trump administration said Sunday that hundreds of individuals were deported from the country after President Donald Trump invoked the Alien Enemies Act, a sweeping wartime authority which has been used only three times before,