The Swedish Coast Guard boarded the 182-meter vessel Jin Hui on Sunday amid suspicions it was operating under a falsified Syrian flag, in what officials described as part of ongoing enforcement actions targeting ships believed to be circumventing Western sanctions on Russia.

The Swedish Prosecution Authority said the captain was detained on suspicion of using forged documents and breaching maritime safety regulations, specifically relating to inadequate seaworthiness. Prosecutor Adrien Combier-Hogg said the individual would be interrogated during the day, adding that coordination had been initiated with other national and international authorities.

Sweden’s Civil Defense Minister Carl-Oskar Bohlin said the vessel appears on sanctions lists maintained by the European Union, Britain and Ukraine, underscoring concerns that it may be linked to networks used to bypass restrictions imposed on Moscow following its invasion of Ukraine.

Western officials have increasingly focused on what they describe as a “shadow fleet” of aging, poorly insured vessels with opaque ownership structures, used to transport Russian oil and other commodities outside formal regulatory frameworks. These ships have raised safety and environmental concerns due to their condition and lack of oversight.

Sweden has conducted several recent boardings of vessels in its surrounding waters as part of broader efforts to enforce sanctions compliance and maritime safety standards in the Baltic region.