Underground Cavity Discovered Following Oil Leak on Rama III Road

On September 15, 2026, Thitipat Chotidechachainan, Secretary to the Minister of Energy, reported on the ongoing investigation into an oil leak detected on Rama III Road. Following an initial site inspection on September 14, officials confirmed that the oil is not leaking directly from a primary transport pipeline. Instead, oil has been observed seeping from an underground cavity.

To mitigate the situation, crews have pumped out oil-contaminated water and utilized sandbags to block the seepage. During a follow-up inspection involving the Department of Energy Business, the Bangkok Metropolitan Administration, and Bangchak Corporation, investigators probed the cavity using a two-meter pipe. The inspection revealed that the void extends more than five meters deep, necessitating further structural analysis to determine the origin of the oil.

For residents and commuters in the area, this discovery is significant as it involves potential structural instability beneath the road surface and environmental contamination. While immediate containment measures are in place, the exact source of the oil and the full extent of the underground cavity remain under investigation. Authorities have pledged to hold any responsible parties accountable once the source is identified. Further updates are expected as technical teams continue to map the underground area.