Updated

Michael Schumacher's manager has confirmed that the Formula One great's family has provided French investigators with the camera he wore on his helmet during a skiing incident in which he was critically injured.

France 24 reports that prosecutors have opened an investigation into the skiing accident due to uncertainty over the precise cause of the fall.

Manager Sabine Kehm said in an e-mail Saturday that Schumacher's condition remains critical but stable. He has been in a medically induced coma since Sunday, when he fell while skiing and struck his head on a rock. He was with his 14-year-old son at the time and was wearing a helmet.

Kehm also sought to play down media speculation about Schumacher's health and requested respect for the family's privacy.

The area where Schumacher was skiing is part of a web of trails that slice down through a vast and, in parts, very steep snowfield. Although challenging, the snowfield is not extreme skiing. The runs are broad and neatly tended, and the ungroomed area in between, known as off-piste — where the resort said Schumacher was found — is free of trees.

The resort said Schumacher was conscious when first responders arrived, although agitated and in shock. But Payen said Monday that after the fall Schumacher was not in a "normal state of consciousness." He was not responding to questions and his limbs appeared to be moving involuntarily.

Several of Schumacher's family members arrived at the Grenoble hospital earlier Saturday.