A branch of the US Immigration and Customs Enforcement (ICE) sent to Italy for the Winter Olympics will not carry out patrols and will have only an "advisory" role, Washington's ambassador to Rome said on Wednesday. But US ambassador to Italy Tilman J. Fertitta said ICE's Homeland Security Investigations unit will be "strictly advisory and intelligence-based, with no patrolling or enforcement involvement". Read more‘Not welcome’: Outrage over Winter Olympics role for ICE in Italy"At the Olympics, HSI criminal investigators will contribute their expertise by providing intelligence on transnational criminal threats, with a focus on cybercrimes and national security threats. "All security operations will remain the responsibility of Italian authorities," he said after meeting Italy's Interior Minister Matteo Piantedosi. ICE operations in a number of US cities have triggered large-scale protests, and the recent killings of two demonstrators have caused outrage.