The Daily Sport and Sunday Sport have suspended publication and will go into administration, their owner has said.
Sport Media Group, which was saved from going out of business by former owner David Sullivan in 2009, said it had ceased trading with immediate effect.
The announcement came after the group warned it had experienced "an insufficient recovery" since December.
The Daily Sport was launched by Mr Sullivan in 1991, following on from the Sunday Sport, first published in 1986
