Ammon News - A federal judge has blocked President Donald Trump from using a 227-year-old law meant to protect the US during wartime to carry out mass deportations of Venezuelans.

Trump on Saturday proclaimed immigrants belonging to the Venezuelan crime gang Tren de Aragua were "conducting irregular warfare" against the US and that he would deport them under the Alien Enemies Act of 1798.

But US District Judge James Boasberg on Saturday evening ordered a halt to deportations covered by the proclamation that will last for 14 days, according to media reports.

Judge Boasberg told a hearing he had heard planes with deportees were taking off and ordered them turned back, the Washington Post reported.

The law allows the US during wartime to detain and remove people threatening the country's safety without having to follow due process. It was last invoked to intern people of Japanese descent during World War Two.

There was little surprise to the proclamation on Saturday, where Trump declared Tren de Aragua was "perpetrating, attempting, and threatening an invasion or predatory incursion against the territory of the United States".

He had promised to use the controversial law for mass deportations during last year's campaign.

The American Civil Liberties Union and other rights group had already sued to block him from using it on Saturday before he issued the proclamation, as well.

At a hearing, the judge said the terms "invasion" and "predatory incursion" in the law "really relate to hostile acts perpetrated by enemy nations," and the law probably did not offer a good basis for Trump's proclamation, according to the New York Times.

An ACLU lawyer had told the New York Times he believed there were two planes of Venezuelan immigrants in the air on Sunday. The BBC has not verified that report.

The case will now move through the legal system and could go all the way to the Supreme Court. BBC