A report on Reuters, based on details provided by a source close to the talks between the two parties, said that the talks began last year and have continued with several meetings this year.
When contacted, Trinity Mirror yesterday denied holding any discussions about the sale of any of its newspapers.
As a publicly listed company, Trinity has come under pressure to sell off its national titles, which includes The People, the Daily Record and the Sunday Mail.
Financial experts have warned that competition and dwindling circulation in the national newspaper market is making for bleaker prospects than in the regional newspaper market.
However, the Trinity Mirror board and chief executive Sly Bailey are believed to have put up strong resistance to selling off the Mirror.
The Daily Mirror's six-month average circulation is down by 8.6% year on year from 1,893,801 to 1,730,901. The Sunday Mirror's six-month average circulation is down by 2.7% year on year from 1,595,075 to 1,552,086.
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