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... The seized cargo vessel "Fitburg" was en route from the Russian port of St Petersburg to Israel at the time of the incident, Finland's Border Guard authority told a press conference in Helsinki.

"At the moment we suspect aggravated disruption of telecommunications and also aggravated sabotage and attempted aggravated sabotage," Helsinki Chief of Police Jari Liukku told reporters.

Concern is growing in Europe at what officials see as an increase in hybrid threats from Russia since it launched its war in Ukraine, which Moscow denies.

Earlier this month, NATO's top military commander said the alliance must be ready to respond to these type of threats to defend its territory.

Hybrid threats refer to both military and non-military tactics designed to undermine an adversary's security. They can include cyberattacks, disinformation campaigns, sabotage of key infrastructure and use of drones or irregular armed groups. ...