Norwegian authorities have detained a Russian ship in the Arctic to enforce a $4.22 billion compensation award won by Ukrainian energy company Naftogaz over Moscow’s confiscation of its assets during the 2014 Crimea annexation, officials confirmed late on Wednesday.

The vessel, the Professor Molchanov, was intercepted off the Norwegian Arctic archipelago of Svalbard following a 24-hour standoff with the Norwegian Coast Guard, according to US law firm Covington, which represents Naftogaz.

Russian state news agency TASS reported that a Foreign Ministry spokesperson has called the Norwegian action “piracy”.

Naftogaz has been pursuing legal action against Russia since 2016 to seek financial compensation for the expropriation of its Crimean property.

A tribunal ⁠in The Hague in April 2023 ordered Russia to pay Naftogaz $4.22 billion ​plus ⁠interest and legal costs, ‌but Moscow has not done so.

“Russia cannot evade responsibility simply by refusing to comply with an international arbitral award,” said Naftogaz Acting CEO Sergii Fedorenko.

Covington, the ‌law firm, said it had been tracking ‌the Professor Molchanov, a Russian-owned vessel that is used for commercial cruises, for months.

Anticipating the ship’s arrival in Svalbard en route to Barentsburg, a Russian mining settlement, Naftogaz’s lawyers applied to ⁠a Norwegian court for the vessel to be arrested there and subject to a compulsory sale.

The application was approved by the Nord-Troms and Senja District Court on Monday. In its ruling, it required the governor of Svalbard to enforce the order, supervise the vessel and ensure that it is not moved.

The governor’s office issued a statement confirming that the ship had ‌been seized and would be held on Svalbard.

Naftogaz has said ​it is coordinating enforcement measures across multiple jurisdictions, including the United ‌States, France, the United Kingdom and ⁠Finland, where Russian assets have been frozen. Russia is appealing the ⁠process, saying no notice was given.

“We will continue to pursue Russian assets around the world until ‌the compensation awarded ​to Naftogaz and other Naftogaz Group companies ‌is paid,” the Ukrainian company said.