Medical officials at Devamatha Hospital in Kerala, India, have confirmed what killed former Prime Minister Raila Odinga.

According to the medics, Raila died of cardiac arrest while receiving treatment in India.

In a statement released by the hospital on Thursday, doctors said the opposition leader collapsed during a morning walk at around 8:30 a.m. Indian time within the premises of the Ayurvedic wellness facility, where he had been recuperating.

Medical staff on-site administered CPR immediately before rushing him to Devamatha Hospital in Koothattukulam, where he was pronounced dead at 9:52 a.m.

The hospital said Mr. Odinga, 80, had been under treatment for diabetes, hypertension, and chronic kidney disease. A post-mortem examination is set to be conducted as part of routine medical and legal procedures.

According to Mathrubhumi.com, an Indian media outlet, Raila was at the Ayurvedic centre for rest and recovery following a mild stroke he suffered while in Kenya. A spokesperson for the hospital confirmed that he had been receiving regular care and was in the company of his family at the time.

The same hospital had previously treated his daughter, Rosemary Odinga, who regained her sight there after losing vision several years ago.

Indian authorities said information regarding Raila’s death had been relayed to the Foreigners Regional Registration Office (FRRO) for official processing in accordance with international protocol.