POLICE have been asked to investigate allegations that the MV Island Trader, which ran aground in the world-heritage listed Lord Howe Island lagoon, was also responsible for two separate marine pollution incidents two years ago.

Complaints have been made that the fuel-supply ship leaked oil into the pristine waters of the lagoon in 2009 and one of the spills involved about 200 litres of oil.

The MV Island at Lord Howe Island.

After receiving the complaints, the NSW Minister for Police, Michael Gallacher, has asked the police to investigate.

There has never been an investigation into the incident despite marine environmental pollution offences attracting a maximum fine of $10 million.