The ferry, MV Trisha Kerstin 3, issued a distress signal at around 1:50 (local time), just over four hours after departing Zamboanga City en route to Jolo Island in Sulu province, before sinking near Baluk-baluk island village in Basilan province, about 5km east of the area.

According to Romel Dua, Commander of the Philippine Coast Guard’s Southern Mindanao District, 316 people have been rescued so far, while 43 others remain unaccounted for. Survivors have been taken to coast guard stations in Zamboanga City and Isabela City for medical care.

The ferry had a maximum capacity of 350 people and the captain reported 332 passengers on board, though the exact number will only be confirmed after rescue operations are completed.