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 (CNN) -- Stolen medical files that may be those of Michael Schumacher are being offered for sale, the injured former F1 racing driver's manager said. 
 
 Schumacher has been undergoing hospital treatment since a skiing accident last year but is now out of a coma. 
 
 Manager Sabine Kehm said the documents had been offered for sale for several days. 
 
 She added, "We cannot judge if these documents are authentic. However, the documents are clearly stolen. The theft has been reported. The authorities are involved." 
 
 Medical files are confidential, and it is forbidden to buy or publish such data, Kehm said. 
 
 "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," she said. 
 
 Schumacher, 45, suffered severe head trauma in a December 29 skiing accident at the French Alps resort of Meribel. 
 
 The champion driver, from Germany, was transferred last week to Switzerland for rehabilitation from a hospital in Grenoble, France, where he was kept in a medically induced coma for more than three months. 
 
 The Grenoble hospital's media office said in a statement that Kehm "told us that a person intended to sell to the press a document allegedly issued from the medical records of Michael Schumacher." 
 
 "Without knowing the precise nature of the document, the Grenoble Hospital decided to sue for 'theft and breach of medical confidentiality' so that an investigation can be initiated." 
 
 A spokesman for the German newspaper Bild, Tobias Frolich, told CNN that the tabloid was among a number of media outlets to be offered Schumacher's alleged medical records, but that "the editorial office decided to reject the offer." 
 
 A French prosecutor investigating the accident concluded that speed was not behind the fall suffered by the seven-time world champion, whose F1 career ended in 2012. 
 
 Read: Schumacher out of coma and transferred to rehab 
 
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 CNN's Stephanie Halasz, Diana Magnay and Lindsay Isaac contributed to this report. ||||| Michael Schumacher’s medical files have been stolen and offered for sale to the media, his manager has announced. 
 
 The files are thought to have been stolen from his hospital in Grenoble. 
 
 The stricken Formula One legend, who sustained life-threatening injuries in a skiing accident six months ago, was moved from Grenoble to University Hospital Lausanne in France last week after it was announced he was no longer in a coma. 
 
 His medical files have reportedly been offered for around €50,000 (£40,000) and contained details of surgical procedures. 
 
 Sabine Kehm, the seven-time champion’s manager, said that stolen documents and data had been offered for sale for several days 
 
 “We cannot judge if these documents are authentic. However, the documents are clearly stolen. The theft has been reported. The authorities are involved,” said Ms Kehm. 
 
 “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.” 
 
 The 45-year-old has been in hospital for nearly six months after his accident skiing off-piste on the French Alpine resort of Meribel in December.
– Michael Schumacher's medical files have been stolen from a hospital in France and are being offered for sale to the media, the F1 champ's manager warns. The files taken from a hospital in Grenoble where Schumacher spent months in a coma after a skiing accident last December contain details of surgical procedures and are being offered for close to $70,000, according to the Telegraph. The manager says while it's not clear if the documents on offer are authentic, they have clearly been stolen and, since it is illegal to buy or publish confidential medical data, she will "press for criminal charges and damages against any publication of the content or reference to the medical file," CNN reports. The 45-year-old racing legend finally emerged from his coma earlier this month and is now undergoing rehabilitation in Switzerland.