CHENNAI: The outgoing Tamil Nadu chief minister O Panneerselvam visited Ennore, outside Chennai and said that 90 per cent of the oil sludge has been cleared after two ships collided and spilled 20 tonnes of oil along the coastline. The sludge removal work will be completed in a day of two, he said. He added that the department of fisheries and revenue were working towards providing relief to fishermen, who have been deeply affected by the oil spill. While the spill has been extended to 12 km along the Tamil Nadu coastline, 75 metric tonnes of sludge has been removed. The spill's impact on aquaculture and coastal vegetation remains unclear.