Trinamool congress MP Tapas Pal was arrested by CBI in connection with the Rose Valley chit fund scam. Pal had been summoned by the agency for his role in the scam and was arrested after four hours of questioning.
Pal who was director in two companies of Rose Valley, had been under the Enforcement Directorate (ED) scanner for some time.
The agency has charged several TMC members in its probes against chit fund companies including Saradha.
Earlier this week, the CBI has summoned two Trinamool Congress MPs, Sudip Bandyopadhyay and Tapas Paul, in connection with the scam case.
The legislators were told to present themselves before the CBI team on December 30.
The development comes days after the Trinamool Congress accused the Centre of using the probe agencies to put pressure on its leaders, who have been protesting against demonetisation. TMC chief Mamata Banerjee has alleged that the Narendra Modi government at the Centre was resorting to "politics of vendetta".
(with inputs from agencies)