A slew of allegations of phone hacking - including 7/7 victims and the parents of murdered schoolgirls Holly Wells and Jessica Chapman - have further deepened the crisis at News International.
Business editor Robert Peston reports that emails handed to the police by News International appear to show payments to the police amounting to 10s of thousands of pounds, which appear to have been authorised by then editor Andy Coulson.
And MPs are to debate phone hacking in the House of Commons, which would see "the mass venting of anger", according to political editor Nick Robinson.
Simon Greenberg, director of corporate affairs at News International, said that the organisation "had been very transparent with the police" since January and had been "in a highly co-operative mode".
If the allegations in the Milly Dowler and 7/7 cases are true, he said, it would constitute "wrongdoing", and accepted Rupert Murdoch's assertion last year that it "would not be tolerated".
Professor George Brock, former managing editor of The Times, said that the phone hacking crisis was "as bad as it gets" for News International.
"In order to get everything back on an even keel, some quite senior people are going to have to leave," he said.
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