Local newspaper Expressen confirmed that Swedish Coast Guard vessels surrounded the Malta-flagged Vezhen, now anchored at the port of Karlskrona. 

"We are directly on site with the seized ship and are taking measures as decided by the prosecutor," said Mattias Lindholm, spokesperson for the Coast Guard. 

Mats Ljungqvist, a senior prosecutor at the National Security Unit, stated that the National Police Operations Department, the Coast Guard, and the Armed Forces are involved in the investigation into Vezhen.

The ship is suspected of damaging the data cable under the Baltic Sea belonging to Latvia's state-run radio and TV center by dragging an anchor. 

According to ship tracking data, Vezhen departed from the Russian port of Ust-Luga last week and was transiting between Gotland and Latvia when the undersea cable was damaged. 

Latvia's state-run radio and TV center said the "damaged" undersea fiber optic cable caused disruptions in data transmission.

Over the past 18 months, three alarming incidents have been reported in which commercial ships traveling to or from Russian ports are suspected of severing undersea cables in the Baltic region.