Rwanda used national identity cards which included ethnicity. Thus, when the genocide began, soldiers, police and militia quickly executed key Tutsi and moderate Hutu leaders, then erected checkpoints and barricades and used these cards to systematically kill Tutsi. In urban areas for example, where residents were more anonymous, identification was facilitated using road blocks manned by military forces; each person passing the road block was required to show the national identity card, which included ethnicity, and any with Tutsi cards were slaughtered immediately. Additionally, moderate Hutu population was pressured to partake in the murders as well and often knew, within their own communities, who was Tutsi.