Pakistani mountaineers Sirbaz Khan of Gilgit-Baltistan and Shehroze Kashif from Lahore summited Mount Makalu in Nepal, an eight-thousander that is the world's fifth-highest peak, on Saturday morning.

According to Alpine Club of Pakistan Secretary Karrar Haidri, Kashif, 20. reached Makalu's top, which is at a height of 8,485 metres, at 6:56am (PST).

Following this feat, Kashif has become the world's youngest climber to have scaled five of the tallest mountains. The accomplishment also makes the 20-year-old the youngest Pakistani mountaineer who has scaled three eight-thousanders in 23 days.

Shehroze Kashif's summits

• Makra Peak (3,885m) at the age of 11
• Musa Ka Massalah (4,080m) at the age of 12
• Chembra Peak (4,600m) at the age of 12
• Minglik Sar Shimshal (6,050m) at the age of 13
• K2 Gondogoro La K2 Base Camp (5585m) at the age of 14
• Khurdopin Pass (5,890m) at the age of 15
• Broad Peak (8,047m) at the age of 17
• Khusar Gang-Alpine Style (6,050m) at the age of 18
• Mount Everest (8,849m) at the age of 19
• K2 (8,611m) at the age of 19
• Manaslu (8,163m) at the age of 19
• Kanchenjunga (8,586m) at the age of 20
• Lhotse (8,516m) at the age of 20
• Makalu (8,463m) at the age of 20

Khan was behind Kashif by minutes in reaching Makalu's top and raised the Pakistani flag on the peak at 8am (local time), according to a Facebook post by the Alpine Club of Pakistan.

He is now the first Pakistani to have conquered 11 of the world's 14 eight-thousanders.

Khan aims to scale all of the world peaks having a height of over 8,000 metres.

Speaking of his latest climb, Khan's expedition organiser Saad Munawar said the mountaineer completed the ascent in his usual style, without using supplementary oxygen.

But, this success would not be celebrated with any extravagance, keeping in view the tragic demise of legendary mountaineer Ali Raza Sadpara a day ago, Munawar added.

"We would also like to dedicate this summit to Apo Ali (Ali Raza). All these successes in recent times are possible only due to the hard work and sacrifices of our senior mountaineers. They lit up the small candle of hope when there was nothing but darkness and today that candle has spread light all around," he said.