Downing St communications chief and ex-editor of the News of the World Andy Coulson will be called in for questioning by the Met Police about fresh phone hacking allegations.
Speaking from Commons Home Affairs Select Committee, Assistant Commissioner John Yates from Scotland Yard said they would need to speak to Mr Coulson about the new allegations made in the New York Times.
Mr Coulson has also volunteered to meet officers to discuss the latest claims. He denies any knowledge of phone hacking - for which the NotW's ex-Royal Editor Clive Goodman and a private detective were jailed in 2007.
Labour upped its attack over the row, summoning Home Secretary Theresa May to answer questions in the Commons after former NotW journalist Sean Hoare claimed Mr Coulson knew that illegal tactics were being used.
Backbencher Tom Watson said Mrs May must not join a "conspiracy" to undermine the "integrity of our democracy".
He called on her to confirm that Tony Blair asked Scotland Yard whether his phone was hacked - a suggestion the former prime minister's office has yet to shed light on.
But Mrs May batted away demands for action, saying ministers would not interfere.
She said: "Any police investigation is an operational matter in which ministers have no role."
