Police in Palghar district yesterday registered four more cases of extortion against local leaders of the Shiv Sena and NCP for allegedly extorting money from builders. While three cases were registered by Vasai police, one by Valiv police station. Police have so far booked ten accused in the case. Nine persons, including Vasai-Virar NCP chief Govind Gunjalkar, have been arrested so far in connection with the cases while Vasai Virar Municipal Corporation (VVMC) corporator Dhananjay Gawde, former deputy district chief of the Shiv Sena, is untraceable. According to a senior police officer, Gawde allegedly made a fresh demand for extortion while he was on the run. "The fresh offences of extortion have been registered against Gunjalkar, Gawde and other accused," according to an official release issued here today.