Who are the Indians arrested by the British colonial authorities?

1On the night of March 20th, 929, the British colonial authorities arrested 3 1 famous Indian trade union leaders and a British journalist in major cities in India. Among the arrested persons are famous leaders and activists of the Indian Trade Union Congress, the Red Flag Trade Union, the Greater Indian Peninsula Railway Union, the All-India Railway Workers' Federation, and the Union and Bangladesh Trade Union Federations.