US President Donald Trump has deployed his "border tsar" Tom Homan to lead on-the-ground immigration enforcement in Minneapolis, after two US citizens were shot dead by federal agents in the city in less than a month.

The White House has said Homan, who arrived in Minneapolis on Tuesday, will now be the "main point of contact on the ground" and will meet with city officials.

It comes as Gregory Bovino, the US border patrol chief and public face of the Trump administration's mass deportation drive in cities across the US, is expected to leave the city along with some of his agents.

Homan, 64, is seen both as a key Trump ally and someone with decades of experience in immigration policy across both Republican and Democratic administrations.

He is also one of the most vocal defenders of Trump's immigration policy and mass deportation drive.