NEW DELHI: The Centre on Friday said the Gopal Subramanium panel appointed by the Delhi government to investigate alleged corruption in the Delhi and District Cricket Association (DDCA) is "unconstitutional and illegal".In a notification to the Aam Aadmi Party government issued by Lieutenant Governor Najeeb Jung, the home ministry has said that since Delhi is not a full-fledged state, it has no power to appoint such a panel."The Ministry of Home Affairs, Government of India, has accordingly held that the notification... issued by the Directorate of Vigilance, Government of NCT of Delhi, is unconstitutional, illegal and therefore has no legal effect," said a letter issued by Delhi LG's office on Thursday.The government came to the conclusion after considering the provisions in Articles 239 and 239 AA and read with provisions of General Clauses Act including the Government of India notification of August 1966.The AAP government has hit back, saying only a court of law shall decide the constitutionality of the DDCA probe panel, and that those who are raising questions on it are "afraid".The rejection of the Delhi government's decision to probe the DDCA comes on top of a bitter fight between the Arvind Kejriwal-led AAP government and the Centre after the raid on the Delhi Secretariat a month ago.The raid had stoked another Centre-AAP clash with Kejriwal alleging that it was meant to seize some files purportedly containing details of alleged corruption in the DDCA when finance minister Arun Jaitley was its president between 1999 and 2013.Kejriwal has accused Jaitley of financial irregularities and conflict of interest while he headed the cricket body, a charge denied by the senior BJP leader.Kejriwal had appointed the Subramanium panel on December 21. Subramanium, a former Solicitor General, had written to National Security Advisor Ajit Doval asking for officers from the CBI, the Intelligence Bureau and the Delhi Police to constitute a Special Investigation Team (SIT) to conduct his inquiry.