Turkish President Recep Tayyip Erdogan on Wednesday met with his U.S. counterpart Donald Trump on the sidelines of the NATO leaders’ summit in London.

The two leaders met after the main session of the NATO leaders’ summit.

The closed-door meeting took half an hour.

The Turkish Foreign Minister Mevlut Cavusoglu, Minister of Finance Berat Albayrak, Minister of National Defense Hulusi Akar, former Prime Minister Binali Yildirim, and Presidential Spokesperson Ibrahim Kalin were also present at the meeting.

Read more: Turkish, US leaders meet amid NATO leaders’ summit