Chennai: DMK deputy general secretary and MP A Raja and former minister Ma Subramanian appeared before Saidapet police on Tuesday. They were questioned for nearly four hours in connection with a case regarding derogatory remarks allegedly made against electricity minister C T R Nirmalkumar during a protest in Saidapet on Sept 12.Police said the inquiry began at 10am and continued until 2pm. Both leaders were questioned about the protest and the remarks made during the demonstration. They were later allowed to leave and asked to appear before the police whenever summoned.Speaking to reporters outside the station, Raja said police had asked only basic questions and had not provided them with copies of the complaint or FIR.Last month, Saidapet police registered a case against Raja and Subramanian under several sections of the BNS following the protest.