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Sweden Seizes Ship Over Potential Sabotage of Undersea Fiber Cable

The undersea cable is based in the Baltic Sea, and may have been deliberately damaged on Sunday, according to officials in Sweden.

 & Michael Kan Principal Reporter

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Sweden is investigating a cargo ship for deliberately damaging an undersea fiber optic cable in the Baltic Sea. “A vessel suspected of carrying out the sabotage has been seized,” Sweden’s Public Prosecutor’s Office announced on Sunday. 

The fiber optic cable ferried data between Sweden and Latvia. But on Sunday morning, the cable's owner detected disruptions in the data transmissions, which prompted officials in both countries to investigate. 

“Currently, there may be delays in data transmission speeds, but for the most part, this does not impact end users in Latvia,” said state-owned company Latvia State Radio and Television Center, which also owns the cable. “Based on current findings, it is presumed that the cable is significantly damaged due to external factors. LVRTC has initiated criminal procedural actions.”

Swedish officials didn’t name which ship they seized. But evidence is mounting that investigators detained a vessel known as the Vezhen, according to Reuters, citing how the ship passed over the affected undersea cable. The Vezhen flies a Maltese flag and is owned by a Bulgarian shipping company called ??Navigation Maritime Bulgare. 

The incident occurs when Europe has become increasingly concerned about ships conducting sabotage of undersea fiber cables. In November, a Chinese ship called the Yi Peng 3, was identified as another vessel that may have deliberately dragged its anchor to damage another cable running along the Baltic Sea. A month later, European investigators were eventually allowed to board the Yi Peng 3. 

“Two European intelligence officials said that they suspected the captain or other officers on the ship could have been bribed by Russian agents,” The Wall Street Journal reported at the time. “The Chinese government most likely wasn’t involved in the incident, according to investigators, intelligence officials and diplomats.” 

Still, the Chinese government has been suspected of trying to sabotage underwater fiber cables to Taiwan. Earlier this month, a Hong Kong-owned cargo ship was discovered near a site, where an undersea cable was damaged. In response, Taiwan has reportedly created a list of 52 Chinese-owned ships it’ll track and inspect if they approach the island’s waters. 

In the meantime, the company Latvia State Radio and Television Center says its already in discussion with a foreign company to fix the damaged undersea cable in the Baltic Sea. “Given that the cable lies at a depth exceeding 50 meters, the exact nature of the damage can only be determined once cable repair work begins,” it added.

About Our Expert

Michael Kan

Michael Kan

Principal Reporter

My Experience

I've been a journalist for over 15 years. I got my start as a schools and cities reporter in Kansas City and joined PCMag in 2017, where I cover satellite internet services, cybersecurity, PC hardware, and more. I'm currently based in San Francisco, but previously spent over five years in China, covering the country's technology sector.

Since 2020, I've covered the launch and explosive growth of SpaceX's Starlink satellite internet service, writing 600+ stories on availability and feature launches, but also the regulatory battles over the expansion of satellite constellations, fights with rival providers like AST SpaceMobile and Amazon, and the effort to expand into satellite-based mobile service. I've combed through FCC filings for the latest news and driven to remote corners of California to test Starlink's cellular service.

I also cover cyber threats, from ransomware gangs to the emergence of AI-based malware. In 2024 and 2025, the FTC forced Avast to pay consumers $16.5 million for secretly harvesting and selling their personal information to third-party clients, as revealed in my joint investigation with Motherboard.

I also cover the PC graphics card market. Pandemic-era shortages led me to camp out in front of a Best Buy to get an RTX 3000. I'm now following how the AI-driven memory shortage is impacting the entire consumer electronics market. I'm always eager to learn more, so please jump in the comments with feedback and send me tips.

The Best Tech I've Had:

  • My first video game console: a Nintendo Famicom
  • I loved my Sega Saturn despite PlayStation's popularity.
  • The iPod Video I received as a gift in college
  • Xbox 360 FTW
  • The Galaxy Nexus was the first smartphone I was proud to own.
  • The PC desktop I built in 2013, which still works to this day.

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