"I'm under strict instructions from my lawyers not to say this," said Rupert Murdoch, before launching into a scathing criticism of Daily Mail editor Paul Dacre.
"I was really shocked by the statement from Mr Dacre the other day that his editorial policy is driven by commercial interests.
"I think that is about the most unethical thing I have read for a long time, and what's more from the most surprising source, as I have great respect for his abilities."
News International bosses fell victim to a "cover-up" over the hacking scandal, Rupert Murdoch told the Leveson Inquiry today.
Today's Leveson hearings focus on the relationship between David Cameron and Rupert Murdoch and the media boss' role in the hacking scandal.
Rupert Murdoch will answer questions on the phone-hacking scandal at the Leveson Inquiry today.