It came as a huge surprise to visitors on the downstream end of Sathanur reservoir to see thousands of fish washed ashore on Friday morning.
Dead fish were washed ashore for a stretch of about 400 metres. Alerted by the locals, officials of the Public Works Department and Department of Fisheries here visited the spot and collected the dead fish.
Sources said the dead fish would be sent to Fisheries College and Research Institute to ascertain the exact reason for their mysterious death. Fishermen and the villagers allege that the miscreants may have used some toxic substances which caused the death of the fish.
However, sources with Public Works Department ruling out the sabotage angle, said strong windy conditions would have cleared the silt from the bottom, which is more likely to be have caused the death.
Appropriate action would be taken based on the findings of the analysis by the experts from the Fisheries Department, sources said.