(CNN) — The Trump administration has sparked controversy with its move Sunday to deport 261 people, some of whom it alleges are members of the Venezuelan gang Tren de Aragua, to an infamous maximum-security prison in El Salvador.

The Trump administration has transferred hundreds of immigrants to El Salvador even as a federal judge issued an order temporarily barring the deportations under an 18th century wartime declaration targeting Venezuelan gang members,

Claiming that the Nicolás Maduro regime has launched an invasion of the United States through a dangerous gang, President Donald Trump on Saturday invoked wartime powers contemplated in a centuries-old act to assume the authority to expedite the mass deportation of Venezuelans citizens.