Namibia's first president, 95-year-old Sam Nujoma, is in critical condition and receiving medical treatment at a local hospital, his son Utoni Nujoma said.
Utoni Nujoma asked the nation to pray for his father.
Sam Nujoma was one of the founders of the South West African People's Organization in 1960, a national liberation movement that led the country to independence from white-minority-run South Africa in 1990.