U.S. President Donald Trump accused Qatar of being a “high-level” sponsor of terrorism

German Chancellor Angela Merkel said on Friday she was concerned about the situation in Qatar, adding that all Gulf nations, and also Iran and Turkey, should work together to find a solution to the regional dispute.

Ms. Merkel, who was speaking in Mexico City alongside Mexican President Enrique Pena Nieto, said it would be impossible to sort out the situation unless all regional actors were involved, citing Iran, Turkey and Qatar.

U.S. President Donald Trump on Friday accused Qatar of being a “high-level” sponsor of terrorism, potentially hindering the U.S. Department of State's efforts to ease heightening tensions and a blockade of the Gulf nation by Arab states and others.

Arab states tightened their squeeze on Qatar by putting dozens of figures with links to the country on terrorism blacklists, while its ally, Turkey, rushed to its side with plans to send troops.

The Pentagon said the blockade was hindering U.S. ability to plan for long-term operations in the region. Al Udeid Air Base in Qatar is home to more than 11,000 U.S. and coalition forces and an important base for the fight against Islamic State. It is the U.S. Air Force's largest base in the region.

U.S. Secretary of State Rex Tillerson said he expected all parties to find a resolution.