A top US immigration official is expected to leave the US city of Minneapolis in what may mark a shift in the White House's tone after the fatal shooting of a second US citizen by federal officers over the weekend.

As Border Patrol Commander Gregory Bovino and some immigration agents depart, "border tsar" Tom Homan will begin leading on-the-ground efforts in the Minnesota city after the shooting of Alex Pretti on Saturday escalated tensions.

The decision by President Donald Trump may indicate the administration's interest in walking back more aggressive federal action in his nationwide immigration crackdown.

Despite the announcement, online tracking of immigration raids shows the administration's efforts have still continued.

Bovino was the face of the operation when Pretti - an observer seen filming agents - got into a confrontation that led to him being shot numerous times on a street in Minneapolis.