A Swedish court has ordered the detention of the Russian captain of a ship suspected of sailing under a false flag as part of Moscow's shadow fleet.

The man, who has not been named, appeared in court in Ystad after being arrested on Friday by the Swedish Prosecution Authority on suspicion of using forged documents.

Members of the coast guard boarded the Sea Owl One in Swedish waters, where it was sailing under a Comoran flag they thought may have been bogus. The 228m (748ft) tanker is on a list of vessels sanctioned by the EU.

Moscow has relied on a network of tankers with obscure ownership or insurance to evade Western sanctions on its oil exports.

The Sea Owl One had been travelling from Santos in Brazil to Primorsk on Russia's Baltic coast when it was intercepted, and was known to have transported oil between Russia and Brazil in recent years, the Swedish coast guard said.