Fire investigators will be assessing a fire on a boat at Timaru's port this morning, now blazing for a fourth day.

Three crews are fighting the blaze - including firefighters from Dunedin and Christchurch.

Southern district communication manager Brent Dunn said the fire was contained but still going strong.


The 80m ship, understood to be a fishing vessel, prompted a large-scale Fire and Emergency response on Monday when the fire broke out.

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10 fire engines attended the fire in the South Canterbury town's port.

Three crew members have been treated for smoke inhalation.

A Timaru District Council webcam showed a large amount of smoke coming from the port.


Police were also at the blaze.

Three ambulances are initially at the scene and dozens of onlookers are watching the scene unfold.