"In November 1969, Bengali versus non-Bengali riots broke out in Dhaka. The traditional trouble spots, Mirpur and Muhammadpur- predominantly Bihari areas-had been the scenes of police firing. Later, the army was called in and the police withdrawn. The army was made up entirely of West Pakistanis while the police was East Pakistani. This caused much resentment and distrust amongst the Bengali police hierarchy and bureaucracy, and made yet another dent in the facade of martial law. Curfew had to be imposed despite the martial law as local and non-local feelings were aroused."