After the withdrawal of the Non-Cooperation movement there had been revival of revolutionary activities. Four revolutionaries including Ram Prasad Bismil and Ashfaqulla,belonging to the Hindustan Republican Association had been hanged after their trial under the Kakori Conspiracy case. In 1928 Chandra Shekar Azad,Bhagat Singh,Sukh Dev and others had founded a new revolutionary organization called the Hindustan Republican Socialist Association. On 8th April 1929, Bhagat Singh and Batukeshwar Dutt went to the Central Legislative Assembly and threw a bomb at government benches and raised slogans of Long live the Revolution. There were no casualties and probably none was intended.Bhagat Singh and Dutt surrendered and were taken into custody. Many other members of the association were arrested later and a bomb workshop unearthed. Except for Chandra Shekar Azad all the prominent members were arrested and charged with the murder of the Superintendent of Police of Lahore also.The prisoners were brutally treated in jail.Jatin Das died after a hunger strike lasting 64 days.Bhagat Singh,Rajguru and SukhDev were later sentenced to death. There execution led to massive protests all over the country.