Within eight hours of registering four extortion cases against sitting Shiv Sena corporator Dhananjay Gawade, NCP's Vasai-Virar City president Govinda Gunjalkar and several other politicians and RTI activists at Nalasopara, Tulinj and Virar police stations between Thursday and Friday night, the Palghar police have registered four more extortion cases against five RTI activists, politicians and an advocate at Waliv and Vasai police stations. These include new FIRs against Gunjalkar and Gawade at Vasai Gaon and Waliv police stations, respectively. These politicians and others have been accused of extorting huge sums of money from builders in Palghar district under threat of construction being halted or constructed buildings being demolished.