Zimbabwe's President Emmerson Mnangagwa and Tanzania's President Samia Suluhu Hassan on Friday sent their condolences to the royal family of Prince Philip, Queen Elizabeth II's husband, who has died aged 99.

The duo disclosed this in a tweet.

Zimbabwe's President Emmerson Mnangagwa in a tweet wrote: "My deepest condolences to the people of the United Kingdomand the @RoyalFamily on the death of His Royal Highness Prince Phillip. May his soul rest in eternal peace".

While the Tanzania's President Samia Suluhu Hassan sent her country's "most profound condolences" to the queen, the Royal Family and the people of the UK.

“On behalf of the Government and people of Tanzania, I convey the most profound condolences to Your Majesty Queen Elizabeth II, the Royal Family and the people of the UK for the demise of Prince Philip. Our thoughts and prayers are with you. May his soul rest in eternal peace. Amen,” President Samia Suluhu tweeted.

Prince Philip "passed away peacefully this morning at Windsor Castle", Buckingham Palace announced on Friday.

The duke, who was the longest-serving consort in British history, had returned to Windsor Castle on 16 March after spending a month in hospital.