"With honest sadness, Kuwait, its people, the people of the Arab and Muslim world, and the people of the world offer their condolences for the death of Emir Sabah Al-Ahmad Al-Jaber Al-Sabah, may God forgive him", said Minister of Royal Court Affairs Sheikh Ali Jarrah Al-Sabah on state TV.
Prime Minister Narendra Modi on September 29 condoled the death of Sheikh Sabah Al-Ahmad Al-Jaber Al-Sabah, leader of Kuwait.
"With the utmost sadness and grief for the Kuwaiti people, the Islamic and Arab world and people of friendly nations, the Emiri Diwan mourns the death of Sheikh Sabah al-Ahmad al-Jaber al-Sabah, the emir of Kuwait", the Emir's office said when confirming his death.
Sheikh Sabah was a USA ally and steered the nation's foreign policy for more than 50 years.
"His Highness Sheikh Sabah was a global icon for peace especially in the Middle East where he was involved in several peace processes covering a number of countries in the region", President Kenyatta wrote in a condolence message dispatched on Tuesday.
He served as a Foreign Minister for 40 years between 1963 and 2003 - when he became the Prime Minister.
Hathras rape case: Woman gang-raped dies in Delhi hospital
The 19-year-old victim was gang-raped and tortured by four men in her village in Hathras district almost two weeks ago. According to reports, the accused had tried to strangulate the girl as she resisted their rape attempt.
Sheikh Sabah's designated successor to the throne is his brother, Crown Prince Sheikh Nawaf al-Ahmad al-Sabah.
According to Sputnik, the news of Emir's demise was confirmed by the minister responsible for his affairs on Tuesday.
The Kuwaiti Emir has been receiving treatment at a hospital in the United States, since July.
Sheikh Sabah earned the title "dean of Arab diplomacy" for his efforts to restore relations with states that had thrown their weight behind Iraq during the 1990-91 Gulf War.
He also had the last say in political matters and had the powers to override or dissolve parliament and call elections.
A succession is not expected to affect oil policy or foreign investment strategy through the Kuwait Investment Authority, one of the world's biggest sovereign wealth funds. Oil policy is set by the Supreme Petroleum Council, appointed by the emir. Parliament would also need to approve the new crown prince.