Citing the revelations made by Press Council of India chairman Justice Markandey Katju, AIADMK leader V. Maitreyan said Manmohan Singh should give a clarification on the issue.
"Manmohan Singh owes an answer to the country. He should break his silence. His silence only confirms the allegation," Maitreyan said.
Deputy Chairman P.J. Kurien, however, said that the former prime minister was not liable to answer.
"He is not the prime minister anymore. He is not expected to answer," said Kurien.
Katju in his blog Sunday said an additional judge of the Madras High Court was appointed during the UPA regime despite an Intelligence Bureau report revealing charges of corruption against him.
The AIADMK members charged their arch-rival DMK of interfering in the appointment of the high court judge when Katju was the chief justice of the Madras High Court in 2004 and sought to know who in the DMK had pressurised the then UPA government not to take action against the judge.