New Delhi, Mar 25 (ANI): DMK chief M Karunanidhi on Tuesday permanently expelled his elder son MK Alagiri from the party, two months after suspending him. The DMK had even threatened disciplinary action against party members if they were found to be in touch with Alagiri. The party general secretary K Anbazhagan, in a statement had said that Alagiri was causing confusion by organizing meetings on the pretext of meeting his supporters. On January 24, the DMK had suspended 63-year-old Alagiri for opposing Karunanidhi's younger son MK Stalin, 61, who is tipped for the party's top post.