By . Damien Gayle . In . rehab:  Documents said to be Formula One legend Michael Schumacher’s medical notes have been stolen, according to his manager . French police investigating the theft . of Michael Schumacher's hospital notes have asked for help from their . Swiss and German counterparts after emails sent by the thieves were . traced to Zurich. The . request by a French prosecutor comes after emails sent to news . organisations offering to sell the notes were tracked to an Internet . Protocol (IP) address in Switzerland's biggest city. The . emails, signed Kagemusha, which is Japanese for 'shadow warrior', offer . the notes from Schumacher's nearly six-month stay in Grenoble Hospital . after a nearly fatal skiiing accident left him in a coma. The thieves were asking for 40,000 euros (£32,000; $55,000) for the dossier. The . Local reports that the documents, stolen over a week ago, comprise 11 . or 12 pages of notes made by a doctor during the former racing driver's . treatment. A Grenoble prosecutor announced the request for help yesterday. Swiss . media reported the tracking of the thieves' IP address across the . border to Switzerland, but French officials would not comment on the . claim, according to The Local. Each . connection to the Internet has a unique IP address which can be traced . to a specific location. However, services do exist which allow Internet . users to hide their true location by masquerading as a different . address. The latest . developments come after Schumacher's manager, Sabine Kehm, threatened . legal action if any of her client's medical information was made public. She . said last week:  'For several days stolen documents and data are being . offered for sale. The offerer claims them to be the medical file of . Michael Schumacher. 'We . cannot judge if these documents are authentic. However, the documents . are clearly stolen. The theft has been reported. The authorities are . involved. 'We expressly . advise that both the purchase and the publication of such documents and . data is forbidden. The contents of any medical files are totally private . and confidential and must not made available to the public. 'We . will therefore, in every single case, press for criminal charges and . damages against any publication of the content or reference to the . medical file. We trust for your understanding.' Scroll down for video . The . University Hospital of the Canton of Vaud (CHUV) in Lausanne, where . Schumacher was transferred from a French hospital to begin a lengthy . rehabilitation regime after his terrible skiing accident left him in a . coma . It . is 26 weeks since Schumacher was left in a coma after suffering his a . serious brain injury while skiing off-piste with his son. He was . holidaying with family and friends in Meribel, where he owns a chalet. There . were claims he had his eyes and was conscious as he was transferred . from Grenoble to University Hospital Lausanne, Switzerland, on June 16, . to begin his rehabilitation. It was said that Schumacher, 45, was able to communicate to ambulance staff by nodding his head. The . report in the Swiss tabloid Blick stated that the ambulance was . operated by Sanitätoberwallis, a company based in Visp in the canton of . Valais rather than from Grenoble or Lausanne. Ambulance . staff were not told the identity of the world-famous patient in . advance. They also had to relinquish their mobile phones on arrival at . Grenoble. Matthias Volken, . medical superintendent of the ambulance firm, said: 'I can confirm that . we carried out the drive to transfer (Schumacher) on Monday.' The paper said Schumacher had lost a lot of weight during his 170 days in hospital since the accident. The hospital where he is now being treated is one of Switzerland’s best and has renowned neurology experts.
IP address used to send the emails to newspapers tracked to Swiss city .
Thieves have asked for 40,000 euros for the sale of the dossier .
Schumacher's manager has threatened legal action if it is published .
By . Damien Gayle . In . rehab:  Documents said to be Formula One legend Michael Schumacher’s medical notes have been stolen, according to his manager . French police investigating the theft . of Michael Schumacher's hospital notes have asked for help from their . Swiss and German counterparts after emails sent by the thieves were . traced to Zurich. The . request by a French prosecutor comes after emails sent to news . organisations offering to sell the notes were tracked to an Internet . Protocol (IP) address in Switzerland's biggest city. The . emails, signed Kagemusha, which is Japanese for 'shadow warrior', offer . the notes from Schumacher's nearly six-month stay in Grenoble Hospital . after a nearly fatal skiiing accident left him in a coma. The thieves were asking for 40,000 euros (£32,000; $55,000) for the dossier. The . Local reports that the documents, stolen over a week ago, comprise 11 . or 12 pages of notes made by a doctor during the former racing driver's . treatment. A Grenoble prosecutor announced the request for help yesterday. Swiss . media reported the tracking of the thieves' IP address across the . border to Switzerland, but French officials would not comment on the . claim, according to The Local. Each . connection to the Internet has a unique IP address which can be traced . to a specific location. However, services do exist which allow Internet . users to hide their true location by masquerading as a different . address. The latest . developments come after Schumacher's manager, Sabine Kehm, threatened . legal action if any of her client's medical information was made public. She . said last week:  'For several days stolen documents and data are being . offered for sale. The offerer claims them to be the medical file of . Michael Schumacher. 'We . cannot judge if these documents are authentic. However, the documents . are clearly stolen. The theft has been reported. The authorities are . involved. 'We expressly . advise that both the purchase and the publication of such documents and . data is forbidden. The contents of any medical files are totally private . and confidential and must not made available to the public. 'We . will therefore, in every single case, press for criminal charges and . damages against any publication of the content or reference to the . medical file. We trust for your understanding.' Scroll down for video . The . University Hospital of the Canton of Vaud (CHUV) in Lausanne, where . Schumacher was transferred from a French hospital to begin a lengthy . rehabilitation regime after his terrible skiing accident left him in a . coma . It . is 26 weeks since Schumacher was left in a coma after suffering his a . serious brain injury while skiing off-piste with his son. He was . holidaying with family and friends in Meribel, where he owns a chalet. There . were claims he had his eyes and was conscious as he was transferred . from Grenoble to University Hospital Lausanne, Switzerland, on June 16, . to begin his rehabilitation. It was said that Schumacher, 45, was able to communicate to ambulance staff by nodding his head. The . report in the Swiss tabloid Blick stated that the ambulance was . operated by Sanitätoberwallis, a company based in Visp in the canton of . Valais rather than from Grenoble or Lausanne. Ambulance . staff were not told the identity of the world-famous patient in . advance. They also had to relinquish their mobile phones on arrival at . Grenoble. Matthias Volken, . medical superintendent of the ambulance firm, said: 'I can confirm that . we carried out the drive to transfer (Schumacher) on Monday.' The paper said Schumacher had lost a lot of weight during his 170 days in hospital since the accident. The hospital where he is now being treated is one of Switzerland’s best and has renowned neurology experts.
of Michael Schumacher's hospital notes have asked tracked to an Internet . Protocol (IP) address in a coma. The thieves were asking for 40,000 euros (£32,000; $55,000) for the dossier. The . Local threatened . legal action if any of her client's