According to France Bleu, the accident occurred in the late morning. The woman was accompanied by a guide from Haute-Savoie who also fell but survived, he is the one who alerted the Chamonix High Mountain Rescue Team (PGHM) at around 11:15 a.m.
The two alpinists who were climbing roped together, fell as they reached almost the summit, at about 3792 meters above sea level, in a very difficult area with steep ice.
According to Le Dauphine, the last part of this slope has an angle of almost 60 degrees, while to two-thirds is a steep narrow composed of many boulders, it is almost impossible to stop in case of a fall.
Tour Ronde N face: Elevation min/max : 3371 m/3792 m; Elevation gain: 550 m; Difficulties height difference: 350 m; Slope: 60°
According to Chamonix PGHM, the guide is seriously injured but "incredibly lucky". He is multi-traumatized but his life is not in danger, he was evacuated by helicopter to the Sallanches hospital.
The victim is Armelle Chichery (40), a plastic surgeon native from Lyon. According to PGHM she was an experienced climber.
An investigation was opened to clarify the circumstances of the accident.