Metro Manila, Philippines – The Philippine Coast Guard (PCG) said on Saturday it is still searching for 15 fishermen in Northern Quezon who went missing on Sept. 1 at the height of Tropical Storm Enteng.

The boat – FBCA Zshan, was on a fishing expedition near the Philippine Rise when it encountered rough seas. It had been on a fishing venture since Aug. 18.

The PCG said another fishing vessel attempted to establish contact with FBCA Zshan but eventually lost communication.“It was later revealed that FBCA Zshan was operating with a single engine at the time of the incident while facing the storm,” PCG Southern Tagalog said in a statement.

The coast guard said it conducted aerial surveys of the waters off Palanan, Isabela, in northern Quezon, and northeastern Luzon area on Sept. 6 – but none of the missing persons were found.

Operations were temporarily suspended due to strong winds.