Turkish President Recep Tayyip Erdogan talks to supporters as he arrives at Eyup Sultan mosque in Istanbul, Turkey, April 17, 2017. REUTERS/Murad Sezer

ANKARA (Reuters) - Turkey’s President Tayyip Erdogan will meet U.S. President Donald Trump in May ahead of a meeting of the NATO alliance, Turkish Foreign Minister Mevlut Cavusoglu said on Wednesday.

On Monday, sources in Erdogan’s presidential palace said Trump had called Erdogan to congratulate him on winning a referendum to expand his authority.