The probe in to Michael Schumacher's skiing accident has been closed after there was found to be no wrongdoing.

Schumacher has been in a coma since he hit his head on a rock when skiing off-piste on December 29 at the Meribel resort in the French Alps. Albertville prosecutor Patrick Quincy said that "no person has been found guilty of any violation" and that the investigation has been closed.

"The accident took place in an off-piste area," a statement from the prosecutor said. "The signage, marking, staking and information provided about the edges of this slope adhere to French norms in place."

The statement also said that the rock which caused Schumacher to fall was over 10 metres (34 feet) away from the rock upon which he hit his head, and that both rocks were more than four metres away from the piste.

Schumacher is being treated at a hospital in Grenoble, where doctors confirmed at the end of January that they were reducing his sedation in order to allow the start of the waking up process. Since then, an update from Schumacher's management on February 13 said he was "still in a waking up process."