DHS and its US immigration and customs enforcement arm are calling the operation Patriot 2.0, modifying the name of a May deportation surge that led to the arrest of 1,500 people in the state, according to the reports.

A spokesperson for the DHS did not immediately respond to a request for comment.

The operation is expected to last several weeks, the New York Times said, quoting unnamed sources with knowledge of the matter.

One of the sources told the Times that Patriot 2.0 was focused on targeting immigrants who had been released from custody despite ICE agents attempting to pick them up from local jails.

It was not immediately clear how many federal officers were involved in the crackdown, which comes as Chicago braces for a Trump administration ramp-up of deportations in the third-largest US city.

NBC 10 Boston quoted a statement from a DHS spokesperson as deriding Boston Mayor Michelle Wu’s so-called sanctuary policies.

“Sanctuary policies like those pushed by Mayor Wu not only attract and harbour criminals but also place these public safety threats above the interests of law-abiding American citizens. ICE is arresting sex offenders, paedophiles, murderers, drug dealers, and gang members released by local authorities,” the statement reported by NBC 10 said.