San Francisco: Police in San Francisco were on Friday preparing for a weekend of protests, including a rally by an Oregon-based group that local leaders labelled "white supremacist" as the city's mayor urged residents to boycott the event.

The demonstrations planned for Friday, Saturday and Sunday across the Bay Area raised concern among San Francisco police and elected officials two weeks after right-wing activists, including neo-Nazis and the Ku Klux Klan, fought with anti-racism protesters in the streets of Charlottesville, Virginia.

A woman, 32-year-old Heather Heyer, was killed at the 'Unite the Right' rally when a man thought to have neo-Nazi sympathies drove his car into a crowd of counter-protesters. Nineteen other people were injured.

President Donald Trump has come under heavy criticism for his response to the Charlottesville protests.