Klara Kolouchova, 46, the first Czech woman to summit the world’s two highest mountains, died Thursday after falling on the lower slopes of Nanga Parbat.

The 8,125-metre (26,656-foot) mountain is one of the world’s most dangerous climbs with a reported one-in-five fatality rate.

“Her feet slipped from a slope and she fell into a ravine,” Nizam-ud-Din, a senior local government official in Diamer district, told AFP, adding that one of her team members reported the death.

“The exact location of her body will first be traced. Once confirmed, appropriate rescue operations will be initiated to retrieve the body by using a helicopter service.”