A U.S. judge in New Mexico on Thursday dismissed trespassing charges against dozens of migrants caught in a new military zone on the U.S.-Mexico border, marking a setback for Trump administration efforts to raise penalties for illegal crossings.

The magistrate ruled that apprehended migrants may not have been aware they were crossing into a military zone.

President Donald Trump’s memo directed the Department of Defense to take control of a 170-square-mile strip of federal land along the southern border in New Mexico. It is “a specified