US federal judge issued a preliminary injunction barring warrantless arrests unless there is a likelihood of escape

US immigration agents in Oregon must stop arresting people without warrants unless there is a likelihood of escape, a federal judge ruled on Wednesday.

US district judge Mustafa Kasubhai issued a preliminary injunction in a proposed class-action lawsuit targeting the Department of Homeland Security’s practice of arresting immigrants they happen to come across while conducting ramped-up enforcement operations – which critics have described as “arrest first, justify later”.

The DHS, which is named as a defendant in the suit, did not immediately comment in response to a request from the Associated Press.

Similar actions, including immigration agents entering private property without a warrant issued by a court, have drawn concern from civil rights groups across the country amid Donald Trump’s mass deportation efforts.