COLOMBO — The captain of a container ship that caught fire and partially sunk off the coast of Sri Lanka, causing one of the country's worst environmental disasters, was arrested on Monday before being granted bail, local police said.

Russian captain Vitaly Tyutkalo appeared before the Colombo High Court for violating the country's Marine Pollutions Prevention Act, which prohibits the unauthorized discharge of pollutants. He was not formally charged but is due back in court on July 1, according to police spokesperson Deputy Inspector General Ajith Rohana.

Bail was set at 2 million Sri Lankan rupees ($10,000), Rohana said.

The fire-ravaged ship, MV X-Press Pearl, began sinking on June 2, heightening fears of an oil and chemical spill that would threaten nearby lagoons, marine life and birds. The vessel was laden with chemicals such as nitric acid and carrying 350 metric tons of oil in its tanks.

The Singaporean-registered ship was sailing from India's Gujarat to Colombo when a fire broke out onboard on May 20, as it was nine nautical miles off the Sri Lankan coast. For 12 days, the Sri Lanka Navy and Indian Coast Guard tried to douse the flames and stop the ship from breaking apart or sinking.

As the fire ravaged the chemical-laden container ship, Sri Lanka's western coastline became inundated with microplastic pollution. Billions of tiny plastic nurdles blanketed popular beaches over a 150 kilometer- (93 mile-) stretch near the capital, according to environmental group Pearl Protectors, prompting a massive ongoing clean-up operation.

Images from the Sri Lanka Navy showed a large number of bags piled on the beach full of debris from the ship.

The Singapore-registered container ship MV X-Press Pearl, carrying hundreds of tons of chemicals and plastics, sank after burning for almost two weeks, just outside Colombo's harbor on June 2.

Fishing in the area was suspended and environmentalists warned birds and marine life could be threatened by plastic and chemical pollution.

Local fishermen said the plastic pollution, which continues to move southward with the current, has destroyed their livelihoods.

In a June 12 statement, the ship's operator, X-Press Feeders, said the rear of the vessel remains on the seabed 21 meters (69 feet) below the surface and the stern of the ship is "afloat and is reported as stable."

It said while the "scene remains under observation with no signs of debris and no confirmed reports of fuel oil pollution" a "gray sheen" continued to be observed, "emanating from the vessel."