U.S. President Barack Obama and Turkish President Recep Tayyip Erdogan met in Washington to discuss efforts within the anti-Islamic State (IS) fight, on the sidelines of Nuclear Security Summit, the White House said.

“The president extended condolences to President Erdoğan on behalf of the American people for those killed and injured in today’s terrorist attack in Diyarbakır, and reaffirmed the support of the United States for Turkey’s security and our mutual struggle against terrorism” according to the White House.

They discussed “US-Turkey cooperation on regional security, counter-terrorism, and migration” the statement of the White House added.

Turkey’s presidential office also issued a statement on April 1, outlining the two leaders’ talks on cooperation to tackle the refugee crisis, as well as how the two NATO partners could ramp up commitment to fight the IS.