MANILA, Philippines — The Philippine Coast Guard (PCG) is leading an inter-agency investigation into the sinking of LCT San Juan Bautista between Romblon and Sibuyan Island on June 30, as authorities move to assess possible environmental impacts and confirm the vessel’s last known movements.

The Coast Guard District Southern Tagalog (CGDSTL) said six Filipino crew members were safely rescued by Fishing Vessel Skip Jack Cri 03 at around 12:40 a.m. on the same day. All were reported in good physical condition.

Initial reports indicate that the vessel departed Guihulngan Port in Negros Oriental on June 28, en route to a drydocking facility in Navotas City. It was carrying 2,500 liters of marine diesel oil but no cargo at the time of the incident.

According to the PCG’s initial assessment, the risk of environmental damage remains low. The agency cited the relatively small amount of light petroleum product onboard and the estimated 360-foot depth of the wreckage as mitigating factors that limit the potential impact on coral reefs or shoreline ecosystems.

“Natural processes such as dispersion and biodegradation are expected to reduce the threat of a significant spill,” the CGDSTL said in a statement.

Authorities have since launched seaborne patrols and coastal security operations in coordination with local officials, fisherfolk, and the Department of Environment and Natural Resources (DENR) to monitor for any oil sheen or pollution. No foul odor or signs of contamination have been detected along the coastline.

An aerial surveillance conducted at 6:30 a.m. on July 1 also confirmed that surrounding waters remain clear, with no visible oil slicks or debris.

The PCG has urged coastal communities to report any sightings of oil or floating debris potentially linked to the sunken vessel to facilitate prompt response actions. Investigation efforts remain ongoing, with a progress report expected in the coming days.