A team of Flying squad has seized Rs 4 crore from three persons who were on their way to Tirunelveli in the poll-bound Tamil Nadu, police and election officials said on Sunday. The office of the state Chief Electoral Officer (CEO) said the Income Tax department will launch a detailed investigation into the matter. The three persons had boarded a train to Tirunelveli from Egmore and the team of officials intercepted them at nearby Tambaram late last night and found Rs 4 crore in their possession.