"It is all lies, all lies, all lies," the 90-year-old DMK chief told reporters outside his Gopalapuram residence here.
Asked about AAP leader Prashant Bhushan accusing him of "cover-up", Karunanidhi shot back saying if media would ask his arch rival and Tamil Nadu Chief Minister Jayalalithaa about the ongoing disproportionate case against her in Bangalore.
"There is a disproportionate case happening (in Bangalore). Can you ask questions to those involved in that like this? Can you meet the Chief Minister like this," he asked.
According to Bhushan, the tapes contained purported conversation between a top officer of the state police and a senior official in Karunanidhi's office as well as between the police officer and Kanimozhi. The alleged conversations took place between November 2010 and February 2011, when Karunanidhi was the Chief Minister.
AAP had demanded an independent probe into the alleged role played by Karunanidhi and the police officer in "covering up" the scam.