Ranil Wickremesinghe, 76, was arrested for allegedly misappropriating LKR 16.6 million in state funds, linked to his 2023 UK trip.
A Colombo magistrate denied him bail after a six-hour hearing, citing no special grounds for release; he faces up to 20 years in jail if convicted.
Taken to the Magazine Remand Prison, Wickremesinghe was admitted to the jail hospital for high blood pressure and sugar levels, but allowed home-cooked meals.