Four Sri Lankan fishermen have died and another two are critically ill after consuming an unknown liquid from bottles they found while at sea, according to local media reports.
The sailors were said to be on a fishing trip when they retrieved the bottles around 320 nautical miles from Tangalle, a town on the southern coast of the island.
The Sri Lanka Navy told reporters the fishermen had drunk from the bottles thinking they contained alcohol.
Director General of the Sri Lankan Department of Fisheries and Aquatic Resources, Susantha Kahawatte, told several outlets that the navy was attempting to bring them back to shore.
He reportedly said that the the navy was providing medical attention to the men aboard the fishing vessel - named the Devon - over concerns there was not enough time to return them to land for treatment.