India, Jan. 26 -- Federal authorities say Alex Pretti was armed when he was fatally shot by Border Patrol agents in Minneapolis, but video footage, witness accounts and statements from his family have questioned that claim.

Pretti, a 37-year-old US citizen and nurse, was killed on Saturday during what officials described as a "targeted" immigration enforcement operation in south Minneapolis. The incident has triggered protests and intensified scrutiny of federal agents operating in the city.

The Department of Homeland Security (DHS) said agents fired in self-defence after Pretti approached them carrying a handgun and resisted attempts to disarm him.

Border Patrol commander Greg Bovino said that Pretti had a "9mm semi-automatic" firearm...