The Nobel Peace Prize-winning human rights activist Tawakkol Karman has sent condolences on the death of Oman’s Sultan Qaboos bin Saeed, who died Friday at the age of 79.

In a condolence statement on her official Twitter account, Karman said: “Great condolences to the Omani people and our Arab and Islamic peoples on the death of Sultan Qaboos, may God have mercy on him.”

Sultan Qaboos, who took office on July 23, 1970, died on Friday evening at the age of 79. In a smooth and swift transfer of power, the Omani Minister of Heritage and Culture, Haitham bin Tariq Al Said, took the oath today after he was chosen as Sultan of Oman.