NEW : Nearly 5,000 arrested near CNN . NEW : Republican National Convention staff sees police use projectiles , tear gas and pepper spray . At least 56 protesters marched peacefully in Ramsey County District Court . But the primary responsibility for street-level security falls to the local police agencies . `` Splinter group '' smashed windows , throw benches into streets .
NEW : Nearly 5,000 arrested near CNN . NEW : Republican National Convention staff sees police use projectiles , tear gas and pepper spray . At least 56 protesters marched peacefully in Ramsey County District Court . `` Splinter group '' smashed windows , throw benches into streets .