Turkish President Tayyip Erdogan announced the possibility of meeting with his American counterpart Joe Biden on the sidelines of the NATO summit in Madrid, according to him, on Tuesday they had telephone conversations.

"This morning we had talks with Biden, perhaps tonight or tomorrow we will hold a meeting in Madrid," Erdogan told reporters before flying to the Spanish capital.

The NATO summit will be held in Madrid on June 28-30.

As NATO Secretary General Jens Stoltenberg noted, the main topics of the summit will be the strengthening of collective defense and deterrence, as well as continued assistance and support to Ukraine.