Speaking at a news conference in the Turkish capital alongside his Bosnian counterpart Igor Crnadak, Cavusoglu said:
"The U.S. said it did not give weapons to the YPG...We captured some of these guns in the hands of the PKK in Turkey.
“There is no distinction between the PKK and YPG. That is why it is not right for the U.S. to give weapons to such a terrorist organization."
He added Turkey knew the U.S. was arming the YPG. Cavusoglu said Chief of General Staff Hulusi Akar, Turkey’s top military figure, told U.S. General Joseph Dunford during an Ankara visit on Sunday not to supply weapons to the terror group.
Cavusoglu said, at Akar’s suggestion, a high-ranking American officer would be stationed at the U.S. embassy for dialogue and cooperation between the two countries' militaries.
The foreign minister also commented on the operation to take the Syrian city of Raqqah from Daesh, saying Turkey's strategy was "certain".
Ankara is opposed to the involvement of the PKK terror group’s affiliates such as the PYD and its military wing, the YPG, in the operation.
"We try to explain to everyone, especially the U.S., that it is wrong to go Raqqah with the wrong groups and with other terrorist organizations," Cavusoglu said.
Cavusoglu added the U.S said the YPG would be involved in a "siege" of Raqqah but would “certainly” not enter the city, stating it could increase support for Daesh from inhabitants.
"We should not have people make a choice between two devils," he added.