More than 80 per cent of the clean-up operation after the oil spill off Kamarajar Port in Tamil Nadu has been completed and most of the residual work is expected to be over within two to three days, Minister of State for Shipping Pon Radhakrishnan told the Lok Sabha on Friday.

Radhakrishnan also told the House that the Directorate General of Shipping has instituted an inquiry under the Merchant Shipping Act to ascertain the cause and contributory factors that led to the accident last Saturday.

"The total quantity of sludge which has been cleaned up till today is 65 tonnes. In addition, super suckers have removed 54 tonnes of oil mixed with water. More than 80 per cent of the work has been completed and most of the residual work is expected to be over within two to three days," he said.

The Indian Oil Corporation has provided special bio-remediation material for treatment of the collected oil sludge for its safe disposal, he said. -- PTI