Kuwait says its 90-year-old ruling emir has been admitted to a U.S. hospital after an earlier health scare and will cancel an upcoming visit Thursday with President Donald Trump.

The state-run KUNA news agency reported late Sunday that Sheikh Sabah Ahmad Al Sabah was undergoing unspecified medical tests, without elaborating.

The news agency quoted the minister of the emir�s diwan council as praying �to Allah the Almighty to bestow His Highness the emir with good health.�

On Aug. 18, Kuwait acknowledged the emir suffered an unspecified medical �setback.�

That came after visiting Iranian Foreign Minister Mohammad Javad Zarif wrote on Twitter that he was �praying for emir�s speedy recovery,� without elaborating.

Sheikh Sabah has ruled Kuwait since January 2006. He�s pushed for diplomacy to solve regional issues

(AP)