A speedboat carrying at least 78 people sank in western Indonesia, and rescuers were searching for nine people still missing in the rough seas early on Friday.
Rescuers have retrieved 11 bodies, mostly women and children, and rescued 58 people so far, many of them unconscious after drifting in choppy waters for hours, said Pekanbaru Search and Rescue Agency chief Nyoman Sidhakarya.
Local television footage showed people standing on an overturned boat trying to reach a fishing boat packed with survivors.
The Evelyn Calista 01 was carrying 72 passengers, mostly people returning from visits to their hometowns to celebrate the Eid al-Fitr holiday with families, and six crew members, Sidhakarya said.
The boat sank about three hours after leaving a port in Tembilahan, a town in the Indragiri Hilir Regency in Riau Province. It was bound for Tanjung Pinang city in a neighbouring province in the Riau Islands chain, a 200-kilometre trip.