Madan Mitra and Sovan Chatterjee, who were arrested by the CBI in the Narada sting case, were admitted to a hospital here early on Tuesday
Tapes showed people resembling senior TMC leaders receiving money allegedly after promising favours
During the assembly polls, Mamata Banerjee kept alleging that the tapes that had emerged as a result of the sting operation were doctored
Kolkata Police today summoned MLA Iqbal Ahmed in connection with its probe into the Narada sting operation