Protesters across U.S. call for justice for George Floyd (LIVE) | USA TODAY

As cities where protests have erupted try to quell the demonstrations, several governors and mayors across the country have imposed or extended curfews Sunday in anticipation of another night of unrest. RELATED: George Floyd protests take widely varying turns More than 20 cities have imposed some type of curfew. Minnesota Gov. Tim Walz announced he would extend curfew for Minneapolis and St. Paul through Monday morning. Other cities who have announced curfews include Chicago, Los