On Friday, President Erdogan and his American counterpart Barack Obama spoke over the phone, and Prime Minister Ahmet Davutoglu had a phone call with NATO chief Jens Stoltenberg.
On Wednesday, Ankara was hit by a suicide bomb attack that left 28 people dead and 81 others injured.
The Turkish government revealed it was carried out jointly by a Syrian-national YPG member and PKK terrorists based in Turkey. The YPG is the military wing of the PYG, which is the Syrian affiliate of the PKK.
Turkey considers the PKK, PYD and YPG to be terrorist outfits.
A day after the Ankara attack, PKK members targeted an armored military vehicle in Diyarbakir province, martyring six servicemen.
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