A story published by the 'Daily Mirror' detailing the affair between Sven Goran Eriksson and Ulrika Johnson may have originated from phone hacking, the Leveson Inquiry heard yesterday.
The tabloid newspaper's editor, Richard Wallace, admitted it was "possible" that the information had come through voicemail interception.
And he conceded that when he was the newspaper's showbusiness editor hacking "might well have been" undertaken on a wider scale by reporters under his watch.
Mr Wallace, who has edited the 'Mirror' since 2004, admitted the illegal practice might have occurred in the newsroom without his knowledge.
Questioned by David Barr, counsel to the inquiry, on how the paper first reported the illicit relationship between the former weathergirl and the then-England football manager, Mr Wallace admitted he did not know.
"I don't recall the exact nature of it but it was from within the showbusiness department," he told the inquiry into press standards yesterday.
He agreed it was "possible" that it came from phone hacking.
Mr Wallace also admitted that a series of articles about Chris Jefferies, the landlord of the murdered Bristol woman Joanna Yeates, were "a black mark on my record as an editor". (© Daily Telegraph, London)