Foreign Minister Mevlüt Çavuşoğlu held a phone conversation with NATO Secretary General Jens Stoltenberg and his British counterpart on Monday.

According to diplomatic sources, Çavuşoğlu spoke with Stoltenberg and British Foreign Minister Boris Johnson.

Details of the phone calls have not been revealed.

Later on during the day, NATO head Jens Stoltenberg called on two of the alliance's members, Turkey and the Netherlands, to defuse their escalating dispute.

"Robust debate is at the heart of our democracies but so is mutual respect," Stoltenberg said. "I would encourage all allies to show mutual respect, to be calm and have a measured approach."

"To contribute to deescalate the tensions, defuse tensions and deescalate the situation, it's important that we now focus on everything that unites us."