A First Information Report (FIR) was registered by police here on Friday against a local Congress leader for allegedly making derogatory remarks against Madhya Pradesh Chief Minister Shivraj Singh Chouhan, an official said. The FIR was registered against Chandrashekhar Patel, former president of the Indore unit of Congress Seva Dal, at Vijay Nagar police station under section 294 (use of abusive words) of the Indian Penal Code and other relevant sections, said Deputy Commissioner of Police (DCP) Sampat Upadhyay. He has not been arrested and probe was on, he said.