As the Civil Disobedience Movement gained momentum, police resorted to more and more violence and mercilessly attacked the satygrahis. In Alipore Central Jail in April 1930, the police brutally attacked Subhas Bose, Jatindra Mohan Sengupta, Satya ranjan Bakshi, Kiran Shankar Roy and others. The attack was carried out under the direction of the then superintendent Major Som Dutt, a former physician in the armed services in the Government of India. Subhas was thrown down and was rendered unconscious for over an hour after being mercilessly beaten by the Pathan sentries deputed by Som Dutt. Government did not conduct an enquiry but later transferred Som Dutt.