Mountain rescue professionals can request rescue at the final light of the day at Dents de Lanfon's summit, Monday evening.

The Dragon 74 civil security helicopter intervened at Bluffy around 9:30 p.m. to rescue a pair of climbers whose abseiling rope was stuck between rocks. This prevented them from progressing along the wall.

The Annecy base was able to rescue the woman and man in their thirties, and they were unharmed.