A suspect in the theft of Michael Schumacher's medical files has been found hanged in his prison cell.

The Zurich prosecutor's office said in a statement that the man - whose identity has not been disclosed - worked for a Swiss helicopter air rescue company called Rega, which was involved in the organisation of Schumacher's transport from a French hospital to Switzerland in June.

The statement said the man was found dead in his cell on Wednesday morning having been arrested on Tuesday. There was no indication that a third party was involved.

Documents believed to be Schumacher's medical files were stolen in late June and offered to various media outlets for a fee believed to be EUR50,000 (?39,500), but never published.

Schumacher had been treated at Grenoble University Hospital since suffering severe head injuries in a skiing accident in the French Alps on December 29 of last year. He spent nearly six months in a medically-induced coma before being transferred to Lausanne hospital in Switzerland.