(a) The Meerut Conspiracy Case:In March 1929, many labour leaders were arrested on the charge of conspiracy. They were taken to Meerut (U.P.) and were tried. The case lasted for four years. Several Indian lawyers pleaded their case.Barring a few, all labour leaders were sentenced to death. This event evoked nationwide resentment and the British government had to declare the Public Safety Ordinance (1929) to deal with the demonstrators.
(b) The Lahore Conspiracy Case:On April 8, 1929, Bhagat Singh and Batukeshwar Dutt, two active members of the Hindustan Republican Socialist Association, went to the Central Legislative Assembly and threw a bomb at government benches and raised the slogan of 'Long Live the Revolution'.There were no casualties. Bhagat Singh, Batukeshwar Dutt and their companions were taken into custody. All the prisoners were brutally treated in jail. Jatin Dass, a political prisoner died after a 64 days' hunger strike in jail. Bhagat Singh, Rajguru and Sukhdev were sentenced to death. Their execution aroused a wave of indignation all over the country.