In 1964, northern and western cities experienced riots in the ghettos. The riots continued for the next four years. In 1965, in the Watts district of Los Angeles, there were six days of rioting. 34 people were killed and 900 injured. In 1967, there were 43 deaths in Detroit. The riots were perceived to arise from black poverty in the North, where there were de facto segregation in housing and schools. In 1967-68, a National Advisory Committee on Civil Disorder, headed by Governor Kerner, warned of the danger of the USA splitting into warring civilisations - black and white.