Former Zimbabwean President Robert Mugabe, who ruled from 1980 to 2017 at the age of 95, has died, President Emerson Mnangagwa said Friday.

"I announce with great sadness the death of Zimbabwe's founding father and former President Robert Mugabe," Mnangagwa wrote in a tweet.

"Commander Mugabe was a liberation champion, a pan-African advocate who devoted his life to the liberation of his people. We will never forget his contribution to the history of our nation and our continent.

Mugabe died in Singapore, where he has often been treated there in the past few years, an informed source told Reuters.

Mnangagwa announced in November that Mugabe was no longer able to walk when he was taken to a hospital in Singapore, but did not specify the nature of his treatment.

Officials have often said he is being treated for cataracts and has repeatedly denied reports in private media that he has prostate cancer.

Comrade Bob, who was an independence hero and then an authoritarian leader, died two years after the military overthrew him in a coup after spending nearly four decades in power. He took power in 1980 when the then Rhodesian independence became independent.