Milly Dowler's family have been offered a multimillion-pound settlement offer by Rupert Murdoch's News International, in an attempt to settle the phone-hacking case that led to closure of the News of the World and the resignation of the company's chief executive, Rebekah Brooks.

It is understood that News International has made a settlement offer estimated by sources at close to ￡3m, a figure that include a ￡1m donation to charity. But the publisher has not yet reached agreement with the Dowler family, whose lawyers were thought to be seeking a settlement figure of closer to ￡3.5m.

The seven-figure sums under negotiation are far larger than other phone-hacking settlements reached, reflecting the fact that the phone-hacking case affected a family who were victims of crime. Thirteen-year-old Dowler went missing in March 2002 and was later found murdered.

It emerged in July that Milly Dowler's mobile phone had been hacked after her death. Voicemails were accessed on behalf of the News of the World, and messages left for her were deleted to make room for more recordings. This gave the family false hope that she was still alive, because messages were disappearing.

On Monday afternoon there was growing speculation that a deal is close, although other sources familiar with the negotiations indicated that there are still enough matters unresolved to mean that an agreement in principle had not yet been reached behind the scenes.