Updated

Michael Schumacher's management has warned that someone is trying to sell documents that may be the medical files of the seven-time Formula One world champion.

Nearly six months after sustaining serious head injuries in a skiing accident, Schumacher left a French hospital last week and was transferred to neighboring Switzerland to continue his recovery. He is no longer in a drug-induced coma.

Schumacher's manager, Sabine Kehm, said in a statement on Monday that notes made about his case have been stolen, and threatened to sue any publication willing to use them.

Kehm said "we cannot judge if these documents are authentic. However, the documents are clearly stolen. The theft has been reported."