Russia's acts of sabotage against Western targets may eventually prompt NATO to consider invoking the alliance's Article 5 mutual defence clause, the head of Germany's foreign intelligence service said on Wednesday.

Russia may launch an attack on NATO territory in the coming years, Bruno Kahl, chief of the German Federal Intelligence Service (BND), has said. Source: Zeit Online, citing Kahl at the German Council of Foreign Relations in Berlin,

Russia's extensive use of hybrid measures against western targets increases the risk that NATO may eventually consider invoking the alliance's Article 5 mutual defence clause, the head of Germany's foreign intelligence service said.