 Simultaneously with the nonviolent protests of the Gandhi-led Salt March, in April 1930, a group led by Surya Sen raided the Chittagong Armoury.In 1930 eleven British officials were killed, notably during the Writer's Building raid of December 1930 by Benoy Basu, Dinesh Gupta and Badal Gupta.Three successive district magistrates in Midnapore were assassinated, and dozens of other actions were carried out during the first half of the decade.