President Trump signed an executive order bolstering U.S. protections for Qatar in the wake of an Israeli strike there that killed six people.

The executive order states the United States “shall regard any armed attack on the territory, sovereignty, or critical infrastructure of the State of Qatar as a threat to the peace and security of the United States.”

“In the event of such an attack, the United States shall take all lawful and appropriate measures — including diplomatic, economic, and, if necessary, military — to defend the interests of the United States and of the State of Qatar and to restore peace and stability,” the order states.

Trump signed the order Monday, when Israeli Prime Minister Benjamin Netanyahu was visiting the White House. Netanyahu called Qatar during the visit to apologize for the strike.

The order highlights that Qatar has hosted U.S. forces and been an ally in the Middle East, including as a mediator in attempts to end the war in Gaza.

The Israeli military conducted a strike last month against senior leadership of Hamas in Doha. The strike killed five of the group’s members and a member of Qatar’s internal security force. 

Trump said at the time that he wasn’t happy with the strike, and the Qatari prime minister vowed to retaliate against Israel. Trump and the Qatari leader met days later in New York.

The president visited Qatar during his trip to the Middle East in May, where the two nations touted business partnerships. Qatar is also providing a jet to be used as a new Air Force One as part of a controversial deal.