US President Donald Trump has threatened to invoke the rarely used Insurrection Act to quell unrest over federal immigration enforcement operations in Minneapolis.

He threatened to send in troops following a night of protests and vandalism in the Minnesota city after an agent shot a man in the leg.

The Department of Homeland Security (DHS) said an officer opened fire after he was attacked by three Venezuelan nationals with a shovel and broom handle.

Tensions have been running high in Minneapolis since an immigration agent fatally shot Renee Nicole Good, 37, last week, sparking nationwide protests.

The Insurrection Act is a 19th Century law that allows active-duty military personnel to be deployed for law enforcement duties inside the US.

Trump posted on Truth Social that he would use the law if Minnesota officials failed to stop the 'professional agitators and insurrectionists'.

Recent clashes have resulted in injuries and damage, as protesters and law enforcement grapple over the situation following the shooting incident.

With escalating tensions, city officials urge for calmer measures as protests continue to emerge in response to immigration enforcement actions.