Sri Lanka quizzes crew of burning ship over ‘worst ever’ marine disaster

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  Smoke billows from the Singapore-registered container ship 'MV X-Press Pearl', which has been burning for the 11th consecutive day as efforts to put out the fire continue off Sri Lanka's Colombo Harbour. AFP

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  Members of Sri Lankan Navy walk past the stacked sacks filled with debris washed ashore from the Singapore-registered container ship 'MV X-Press Pearl'. AFP

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  A crab roams on a beach polluted with polythene pellets that washed ashore from burning ship 'MV X-Press Pearl'. AP Photo

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  A Sri Lanka Navy officer patrols the shore as he walks through the washed up debris. AFP

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  Sri Lanka's Air Force personnel remove debris washed ashore. AFP

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  A resident walks past the remains of a burnt container washed ashore. AFP

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  Smoke billows from the Singapore-registered container ship 'MV X-Press Pearl'. AFP

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  Sri Lankan Navy personnel try to remove damaged containers. EPA

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  Sri Lanka Air Force personnel wearing protective clothing clear the beach from debris and other materials. EPA

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  Members of Sri Lankan Navy remove debris washed ashore. AFP

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  Members of Sri Lankan Navy remove debris washed ashore. AFP

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  Members of Sri Lankan Navy conduct clean-up operation. AFP

Sri Lankan criminal investigators began questioning the crew of a burning cargo ship on Monday, as the Singapore-registered carrier smouldered for a twelfth straight day in one of the island's worst-ever marine ecological disasters.

A fire broke out aboard the MV X-Press Pearl, which was carrying 25 tonnes of nitric acid and a huge amount of plastic raw materials, as it was about to enter Colombo harbour on May 20.

There were no visible flames aboard the vessel mid-Monday, but smoke was rising from the rear section, its operator and officials said.

Firefighters were still working at the site, they said, adding that the stricken ship was still too hot to be boarded.

Detectives interviewed the vessel's skipper and chief engineer – both Russians – and its chief officer, an Indian, at a hotel where they have been quarantined, police said.

"We have questioned three members of the crew so far and the investigations are ongoing," a police spokesman added.

"Select seafarers have today been helping local police with their enquiries into the fire and are co-operating with investigators," the vessel's operators, X-Press Feeders, added in a statement.

"We will respect this process and not publicly discuss operational details until the investigation has been completed."

The intense flames destroyed much of the cargo, some of which fell into the Indian Ocean.

Tonnes of microplastic granules from its cargo of nearly 1,500 containers have inundated Sri Lanka's famed beaches, forcing a fishing ban and sparking fears of ecological devastation.

The Marine Environment Protection Authority (MEPA) chief Dharshani Lahandapura said they were still assessing the ecological damage, but believed it was the "worst ever in my lifetime".

MEPA said the captain of the vessel had known about a nitric acid leak on May 11, long before the vessel entered Sri Lankan waters.

Authorities are moving to sue the owners of the vessel and its crew and claim damages from insurers.

The three-month-old ship was heading to Colombo from Gujarat, India.

It had previously visited Qatar and Dubai and was due to go to Malaysia and Singapore after calling at Colombo.