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,

The judge’s initial temporary restraining order blocked the Trump administration from deporting five Venezuelans.