Marine officials use Teepol solution and oil absorbent pads to contain an oil spill along the coast of the Tha Chin River in Samut Sakhon province. A vessel carrying furnace oil caused the spill after it capsized on Monday. Photos by Thanarak Khoonton.
Provincial governor Arthit Boonyasophat said on Wednesday that the oil slick had reached a fishermen's village and mangrove forest on the coast 40 kilometres from Bangkok.
But he says workers have already scooped up 75% of the 1,500 litres of oil and are working hard to finish the cleanup before further damage is done.
Mr Arthit says water seeped into the engine room of the medium-sized boat, causing it to capsize Monday.
Authorities are trying to salvage the sunken boat. It sank about 4 kilometres from the coast.