New Delhi: May 24, 2021 The CBI on Monday morning went to the Supreme Court to challenge the Calcutta High Court order allowing the house arrest of four political leaders from Bengal – three from Chief Minister Mamata Banerjee’s Trinamool – in the Narada bribery case. The fourth is a former party leader. The Supreme Court is likely to hear the case around 10.30 am on 24 May 2021. This puts a question mark over the High Court hearing that has been scheduled for 11 am. Those arrested are ministers Firhad Hakim and Subrata Mukherjee, MLA Madan Mitra, and Sovan Chatterjee, who quit the Trinamool to join the BJP before leaving that party too in March. Mr Hakim is a key minister in the fight against COVID-19 in Kolkata, was also allowed to work from home.