As the issue kept popping up, Union Minister A Raja on Saturday described as "baseless and politically motivated" allegations by AIADMK chief Jayalalithaa that he had tried to influence a Madras High Court judge in a marksheet scandal case.

"The allegations are baseless and politically motivated. It's categorically clear... how many times do you want to know," Raja asked reporters in Chennai.

Jayalalithaa had named Raja as the minister who called up Justice R Reghupathy to influence him for an anticipatory bail to Krishnamurthy, a doctor, and his son S Kirub Shridhar.

"A Union Minister talked to me and sought to influence me to grant anticipatory bail to the petitioners," the judge had told an open court on June 29 without revealing the name of the Minister, sparking off a nation-wide outrage.

Asked whether he had any relationship with Krishnamurthy, Raja shot back "which Krishnamurthy?"

The Minister parried questions on whether he intended to take legal action against Jayalalithaa for her allegations.

The AIADMK supremo had on Thursday alleged that the Minister was Raja and was acquainted to Krishnamurthy.

She also alleged that Krishnamurthy hailed from Perambalur, Raja's native town, where the minister reportedly had his law office in a building owned by the doctor.

A CBI case was filed against the father-son duo for allegedly using services of a Puducherry University official and a middleman to inflate marks of Shridhar.