Tense protests over the death of George Floyd and other police killings of black men spread across the US on Saturday night as mayors around the country imposed curfews and several governors called in the national guard amid scenes of violence, injuries and unrest.

After a Friday night that saw anger at police brutality erupt into rioting and unrest in cities across the country, authorities appeared intent on re-establishing order through increased shows of force.

Governors of six states, including Minnesota, where Floyd died on Monday, called out national guard troops. Many cities including Atlanta, Los Angeles, Louisville, Columbia, Denver, Portland, Milwaukee and Columbus, imposed curfews in anticipation of a restless night ahead.