In a statement on its website, the Tribune, which is in receivership following the withdrawal of funding by shareholder Independent News & Media, confirmed that a decision had been made to defer publication of the newspaper.
Yesterday IN&M, which holds a 29.9 per cent shareholding in the Tribune's parent company, Tribune Newspapers plc, said it had committed "adequate funding" to meet staff costs for the month of February.
This followed an announcement by IN&M that ongoing funding of the Sunday Tribune "is no longer viable".
Responding to the news, National Union of Journalists Irish secretary Seamus Dooley said the union is "gravely disappointed".
He criticised the decision in light of the impending Irish general election which he said "would have been a showcase for the paper".
He added that ceasing publication would also make it "more difficult" to secure a purchaser.
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