More than 100 jobs are set to be axed at News International, it has been announced.
Chief executive Tom Mockridge told staff in an internal memo there would also be "discussions" with editors across the newspaper group's titles about the use of casual staff.
It is understood that all departments at The Sun, The Times and the Sunday Times will be hit by the job losses, including editorial staff.
Mr Mockridge wrote: "In the period to the end of this financial year, we expect to reduce the News International workforce by 110 staff positions, out of a workforce of approximately 3,000. In addition, there will be discussions with editors about the use of casuals.
"From today we will be announcing changes to our business, starting with the areas first affected, and yesterday (Monday) we began consultation with our staff association NISA over the proposals.
"Despite this tough news, I have great confidence in NI and our future. We are continuing to invest in new products and quality content to protect our future and better equip us for the changing markets."
It had been "an extremely testing time" for everyone at News International, he said, in an apparent reference to the hacking scandal that rocked the Rupert Murdoch-owned company over the summer and resulted in the closure of the News of the World.
Mr Mockridge told staff that 89 former News of the World employees had taken up the enhanced redundancy terms on offer to them, but did not provide further detail.
The company has been seeking efficiencies for some time, he said, and over the last few months some 100 vacancies have been left unfilled. But at the same time it is investing in a new editorial system, a new customer management system in marketing and sales to improve the management of subscriptions to the titles, and a "web and app" development to give customers more choice about how they receive News International content, it was announced.
The announcement prompted anger from the National Union of Journalists, with Barry Fitzpatrick, head of publishing, saying: "Rupert Murdoch received a £12.5 million bonus from News Corp for the last financial year and it is a disgrace he is going to make staff redundant."
