Nigeria’s top police official on Saturday ordered the immediate mobilization of all officers to “reclaim the public space from criminal elements masquerading as protesters” after days of unrest and demonstrations over police abuses that left at least 69 people dead. The police order could further heighten tensions in Africa’s most populous country after some of its worst turmoil in years. Nigeria’s inspector general of police, M.A. Adamu, ordered colleagues to “dominate the public space” while announcing that enough is enough, a statement said.