Former Telecom Minister A Raja, DMK MP Kanimozhi and 17 other accused were on Friday summoned to appear on May 26 by a Delhi court which took cognisance of the charge sheet filed in connection with a money laundering case related to 2G scam by the Enforcement Directorate (ED).br br Special CBI Judge O P Saini asked all the accused, including DMK supremo M Karunanidhi's wife Dayalu Ammal, to appear before it, saying there is "enough incriminating material" on record to proceed against them.