Turkish President Tayyip Erdogan announced on Tuesday that he will host a summit in Istanbul on March 17 with German Chancellor Angela Merkel and his French counterpart Emmanuel Macron to discuss migrant crises.
British Prime Minister Boris Johnson might also attend the summit, Erdoğan added.
Speaking to reporters on his plane returning from Brussels, Erdoğan has reiterated his previous call for Greece to open gates to refugees on the country's border, adding that Turkey is not considering closing its gates to Europe for now.
Erdogan said that the United States was softening its stance on a potential sale of U.S. Patriot defence systems, adding that Washington had asked Ankara to guarantee it will not activate Russian S-400 defence systems.
"We made this offer to the United States on the Patriot: If you are going to give us Patriots, then do it. We can also buy Patriots from you," Erdogan told reporters on a return flight from Brussels. "They also softened significantly on this S-400 issue. They are now at the point of 'promise us you won't make the S-400s operational'," he added.