The search and interrogation process by Income Tax department is continuing at the house of Swarup Biswas. He is brother of state minister Arup Biswas. Swarup Biswas is alleged to evade income tax. Besides IT raid is going on at Behala, Pornorshri areas of Kolkata. Search is also going on at two real estate companies named Eden Realty and Multicon Real Estate. The search and interrogation at the house of Swarup Biswas has crossed 48 hours.