The US immigration agency whose officers have been involved in two fatal shootings in Minneapolis has said it is sending agents to help support American security operations during the Winter Olympics, which start in Italy on 6 February.

Confirmation of the agency’s role came from the Immigration and Customs Enforcement (ICE), after reports prompted alarm and anger in Italy.

“This is a militia that kills… of course they’re not welcome in Milan,” the city’s mayor, Beppe Sala, told Italian radio on Tuesday.

An ICE spokesperson stressed that “all security operations remain under Italian authority”.

US embassy sources in Rome had already explained to Italian media that various federal agencies had worked at previous Games in the past, although it was not clear if the customs and enforcement agency had itself taken part.

Italy’s Interior Minister Matteo Pantedosi had initially appeared unaware that US immigration officials would be coming to the Milan-Cortina Olympics and said even if they were, foreign delegations could choose their own security, saying: “I don’t see what the problem is and it’s very normal.”

The governor of Lombardy region, Attilio Fontana, sought to calm the situation, suggesting that ICE agents would be deployed in Italy to protect US Vice President JD Vance and Secretary of State Marco Rubio.