US Senator urges mobile, social media providers to keep Capitol rioters’ data as dozens of protesters arrested

A ‘horned’ protester and a man photographed carrying off US Speaker Nancy Pelosi’s lectern during the Capitol Hill riots are among dozens of protesters that have been arrested, while a top Democratic politician has called on mobile carriers to preserve social media content related to the incident.

The FBI asked the public for help identifying participants, given the proliferation of images of the riots on the internet.

Five people died, including a Capitol Hill police officer.

On Saturday US Senator Mark Warner, a Democrat who is the incoming chairman of the Senate Intelligence Committee, urged mobile carriers to keep content and associated metadata connected to the riot, which erupted as lawmakers gathered to certify the…