Protesters in several US cities blocked highways and swarmed police precincts in demonstrations against fresh cases of police violence towards unarmed black men. Most recently 250 activists marched across New York's Brooklyn Bridge carrying placards that stated, ‘Stop murder by police’ and ‘Stop killer cops.’ At least 12 people, some schoolchildren, were arrested following a scuffle with police. Los Angeles police arrested 15 protesters from a group of nearly 100 after they stopped on Metro Rail tracks and ignored orders to disperse. In San Francisco 100+ protesters surrounded a police station and disrupted a meeting at City Hall. In Oakland, demonstrators massed outside the Police Department and swarmed onto Interstate 880. These are but a few of the reported incidents following the 4 April fatal shooting of Walter Scott, an unarmed black man shot in the back by a white police officer in South Carolina.