European nations must be prepared to face further incidents in the Baltic Sea following the recent damage to undersea infrastructure, leaders of NATO countries in the region said on Tuesday ahead of a security meeting in Helsinki.

Speaking ahead of a NATO leaders' meeting in Helsinki, the German chancellor urged those countries to coordinate and act swiftly in the Baltic Sea region.

Several undersea telecom and power cables have been severed in the Baltic Sea in recent months, with experts and politicians accusing Russia of orchestrating a hybrid war

NATO is increasing its surveillance operations in the Baltic Sea region with two ships deployed to the area following suspected sabotage of undersea cables between Finland and Estonia.

Finnish police said on Tuesday they had recovered a lost anchor from the seabed as part of an investigation of suspected sabotage against power and internet cables in the Baltic Sea.

Baltic Sea NATO member countries plan to discuss security in the region at a summit in Helsinki on Tuesday that comes in the wake of a number of recent acts of suspected sabotage at sea. The main purpose of the summit is to find ways to better protect critical infrastructure in the Baltic Sea and to counter the threat posed by the so-called Russian shadow fleet.