U.S. Secretary of State Marco Rubio met Monday in Jerusalem with Israeli Prime Minister Benjamin Netanyahu, as close U.S. ally Qatar gathered other Arab nations' leaders for a summit to issue unified condemnation of last week's Israeli airstrike targeting Hamas leaders in the Qatari capital.

On Sunday, President Trump urged Netanyahu's government to be "very careful" following the airstrike in Doha.

"They have to do something about Hamas, but Qatar has been a great ally to the United States," Mr. Trump told reporters at Morristown airport in New Jersey.

Speaking Monday alongside Rubio, Netanyahu heaped praise on the Trump administration for its staunch, increasingly unique international support of Israel's tactics in its ongoing war against Hamas — which has long been designated

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