The area comprising East Bengal , especially the Dhaka and Chittagong Divisions had been witness to numerous instances of ethnic violence in the decades preceding the Partition . In the 1940s , the frequency and intensity of the riots increased as the movement for Pakistan gained momentum . In the last quarter of 1946 , the Bengali Hindus of Noakhali and Tippera districts were subjected to a series of massacres , loot , arson , rape , abduction and forced conversion to Islam , which came to be known as the Noakhali riots
Noakhali riots
Noakhali riots
1950 East Pakistan riots