The Government on Friday told the Supreme Court that the issues raised by Tata chief Ratan Tata in his petition relating to the Nira Radia tapes require investigation.The apex court had issued notices on the second of this month to the Union Home and Finance Ministries, CBI, Central Board of Direct Taxes and the Income Tax Department on Ratan Tata's plea seeking probe into the leakage of audio tapes of his telephonic conversation with Radia.The court had also issued notices to the magazines, which had published parts of transcripts of the taped conversation. It had given 10 days to all respondents to file their reply and had posted the case for hearing on Monday.