A spokesman for former Zambian President Frederick Chiluba says the former president collapsed at his home Thursday and has been admitted to a hospital.
Spokesman Emmanuel Mwamba says Mr. Chiluba is under observation at a facility in the Zambian capital, Lusaka. Reuters news agency quotes the spokesman as saying Mr. Chiluba's condition is "serious."
Earlier this month, a British judge convicted Mr. Chiluba and four of his aides of stealing $46 million in Zambian state funds. The former president was due to appear before a panel of doctors next week to determine whether he is fit to resume his corruption trial.
The trial was put on hold earlier this year because of Mr. Chiluba's ill health. He has been undergoing treatment for a heart ailment.
Mr. Chiluba served as Zambia's president for 10 years ending in 2001.
Some information for this report was provided by AFP and Reuters.