Turkish President Recep Tayyip Erdogan says Ankara will freeze Finland and Sweden's NATO participation offers in the event that the Nordic nations don't keep guarantees on "psychological warfare" made the month before.

Turkey will freeze Finland, Sweden’s NATO bids if promises unkept: Erdogan

Finland and Sweden applied for participation of the transoceanic military union in light of Russia's attack of Ukraine, however were at first met with resistance from Turkey, which blamed the Nordic nations for supporting gatherings it considers to be "psychological militants".

The three nations marked an agreement at the NATO culmination in Madrid last month to lift Ankara's denial in return for promises on "counter-psychological warfare" and arms trades.

Nations trying to join the NATO collusion should have their enrollment applications supported by each of the 30 existing part states, and confirmed by the nations' separate parliaments.