Anti-government violence has hit a 30-year high in the United States

Violence targeting the United States government has soared to a 30-year high, driven by attacks from the Left for the first time in decades, according to new analysis.

The Center for Strategic and International Studies (CSIS) identified 20 domestic attacks and plots last year, of which 10 it categorised as originating from the far Left, while eight it said came from the extreme Right.