Tamilnadu Higher Education Minister Dr. K.Ponmudy has been summoned for questioning by the Enforcement Directorate in Chennai. He has to appear before the officials by 4 p.m. today. The 72-year-old DMK leader was questioned by the Enforcement Directorate yesterday for more than 8 hours after the raids were conducted at his residences and offices in nine places in Chennai and Villupuram. The places belonging to his son and Lok Sabha MP, Gautham Sigamani were also raided. The case is with regard to the violations of granting quarry licenses when he was a Minister for Mines.