In 1967, out of a police force of 1,400, only 150 members were black, mostly in subordinate positions. Racial tensions arose because of the disproportion between residents and police demographics. Since Newark's blacks lived in neighborhoods that had been white only two decades earlier, nearly all of their apartments and stores were white-owned as well. The loss of jobs affected overall income in the city, and many owners cut back on maintenance of buildings, contributing to a cycle of deterioration in housing stock.