South African judge Navanethem "Navi" Pillay won the Nobel Peace Prize on Friday "for her efforts to promote peace and international law," the Norwegian Nobel Committee said.

"A common thread runs from her early work defending Nelson Mandela and others who stood up against apartheid to her service as a judge in some of the key international court cases of our time," the committee said.

The peace prize is the fifth Nobel awarded this week, after literature, chemistry, physics and medicine. Venezuelan opposition leader Maria Corina Machado won in 2025.

The Nobel Peace Prize, worth 12-million Swedish crowns, or about $1.2-million, is due to be presented in Oslo on December 10, the anniversary of the death of Swedish industrialist Alfred Nobel, who founded the awards in his 1895 will.

The United Nations human rights office on Friday welcomed the news of Pillay's Nobel Peace Prize win, acknowledging her longstanding advocacy for human rights. 

"It is amazing news, we need more dedication and commitment to human rights," Shabia Mantoo, spokesperson for the UN human rights office, told reporters in Geneva.

Pillay was the former head of the United Nations Commission of Inquiry on the Occupied Palestinian Territory and a former International Criminal Court judge.

In September last year Pillay oversaw the publishing of a report by the UN Commission of Inquiry that concluded that Israel had committed genocide in Gaza and that top Israeli officials including Prime Minister Benjamin Netanyahu incited these acts - accusations that Israel called scandalous.

"We hope it will encourage and continue to encourage and inspire others to speak out in protection and promotion of the human rights of all people around the world," Mantoo said in reaction to Pillay's win.