United Nations chief Antonio Guterres on Wednesday hailed Donald Trump’s diplomatic efforts to help secure a truce in the Gaza Strip following 15 months of war.

“I will praise the United States, Qatar and Turkey for their efforts for months and months and months to obtain the release of hostages, also to obtain the ceasefire,” Guterres said at the World Economic Forum in Davos, Switzerland.

“There was a large contribution of the robust diplomacy of the at-the-time president-elect of the United States,” he added.

“I feel that when we had the position of Israel still reluctant to the ceasefire just two days before it happened, and then all of a sudden there was an acceptance,” he added.

Trump had warned there would be “hell to pay” if there was no agreement to release hostages held by Hamas.