Hundreds of mostly Venezuelan alleged gang members were deported from the United States to a prison in El Salvador on Sunday, with the Trump administration invoking wartime powers to speed up removals despite a court ruling halting the move.

A federal judge in an emergency order instructed the administration it could not use wartime laws to deport immigrants it claims are associated with organized crime

The Trump administration has invoked a 227-year-old law, the Alien Enemies Act, to target Tren de Aragua, a gang with its roots in the prisons of Venezuela. Who are they and how wide is their reach?

Tren de Aragua, a gang born out of a Venezuelan prison, is a loose network that doesn’t operate like groups typically considered terrorist organizations.

President Donald Trump on Saturday invoked the Alien Enemies Act of 1798 to target a Venezuelan gang he accused of "unlawfully infiltrating" the United States.