The disruptions are believed to involve intentional signal manipulation, causing the ships' location to jump back and forth, according to the authorities.
We haven't seen this many reports in the middle of the Baltic Sea, says Sebastian Wigmo, press spokesperson at the Swedish Maritime Administration, to the newspaper.
The safety at sea should not be affected by the disruptions, but the Swedish Maritime Administration has sent out a navigation warning.
We urge extra caution, says Wigmo.
Russia has previously been pointed out as a country likely to be behind GPS disruptions in the Baltic Sea, writes Aftonbladet.
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