An elderly man has died at Lyttelton Harbour, though police cannot say yet what happened.

A police spokeswoman told Fairfax the man was pulled from the water.

However another spokeswoman told the Herald there were conflicting reports on whether or not the 77-year-old had actually been pulled from the water.

Paramedics treated the man at the scene, but he died, she confirmed.

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It happened at Godley Quay about 10.15am.

There are no suspicious circumstances and the matter has been referred to the coroner.