 South Africa's former president Jacob Zuma has been admitted to hospital less than a week before his due in court for a graft trial. The country's Department of Correctional Services confirms the admission is for medical observation. The 79-year-old is scheduled to attend the resumption of a long-running corruption trial on August 10. The hearing will include a plea to drop 16 charges of fraud, graft and racketeering against him, related to the 1999 purchase of military hardware.