LUXEMBOURG — Secretary of State John Kerry said Sunday that the failed coup in Turkey has created only minor delays in the military campaign against the Islamic State in Syria and that it will not diminish Turkey’s role in the fight.

Kerry, who talked by phone three separate times Saturday with Turkish Foreign Minister Mevlut Cavusoglu, told CNN he was assured that the continuing turmoil will not interrupt counterterrorism efforts based in Turkey. Missions against the Islamic State are flown out of Incirlik Air Base near Adana. Air space was closed Saturday after the coup attempt but reopened Sunday. Kerry said he expected operations would return to normal “very quickly.”

“According to our commanders, there may have been a minor delay here or there or something, but it has not affected the fundamental direction or commitment to the fight,” Kerry said on CNN’s “State of the Union,” in the first of three pretaped interviews he gave in Luxembourg to the Sunday morning talk shows.

The attempted coup has exacerbated tensions between the United States and Turkey, a fellow NATO member. After Turkey tightened its border in response to U.S. complaints it was allowing Islamic State fighters to cross unimpeded, relations had improved. But since the coup, Kerry has publicly and in conversations with Cavusoglu urged Turkey to uphold democratic principles even as it investigates the coup plotters and detains thousands of suspects.

Kerry also has pushed back against allegations by senior Turkish officials that the United States may have played a role in the coup, and who have demanded the extradition of Fethullah Gulen, a Turkish cleric living in Pennsylvania.

On Saturday, Kerry said the United States was open to the idea of extradicting Gulen, but said Turkey must first provide evidence that meets U.S. legal standards.