A massive escalation in Bengal political war. CBI has mounted heat on Mamata's family. serving notice to Rujira Narula Banerjee, the wife of Didi's nephew Abhishek Banerjee. As per CBI Sources, Rujira's name cropped up during an investigation into an alleged coal smuggling case. Abhishek Banerjee says won't be cowed down. Watch the video to know more.