The Biden administration has imposed a temporary freeze on U.S. arms sales to Saudi Arabia and is scrutinizing purchases by the United Arab Emirates as it reviews billions of dollars in weapons transactions approved by former President Donald Trump, according to U.S. officials. The review, the officials said, includes the sale of precision-guided munitions to Riyadh, as well as top-line F-35 fighters to Abu Dhabi, a deal that Washington approved as part of the Abraham Accords, in which the Emirates established diplomatic relations with Israel.

U.S. officials said it isn’t unusual for a new administration to review arms sales approved by a predecessor, and that despite the pause, many of the transactions are likely to ultimately go forward. But in line with campaign pledges made by President Biden, Washington is seeking to ensure that American weapons aren’t used to further the Saudi-led military campaign in Yemen, where its conflict with the Iranian-aligned Houthis has resulted in thousands of civilian deaths and widespread hunger.

Mr. Biden “has made clear that we will end our support for the military campaign led by Saudi Arabia in Yemen, and I think we will work on that in very short order,” Secretary of State Antony Blinken said at his confirmation hearing last week. Washington will continue to help defend the Saudis against Houthi attacks, Mr. Blinken said.

A senior administration official said the weapons sales to Saudi Arabia were being frozen pending the review, but that sales to the Emirates were not frozen while they are being examined. The $23 billion arms package to the UAE includes long-lead items such as jet fighters and drones that wouldn’t be delivered in some cases for many years.

In a Twitter post, the UAE embassy in Washington said, “As in previous administrations, the UAE anticipated a review of current policies by the new administration.”

The embassy said the F-35s represent a deterrent to aggression in the region. “In parallel with new dialogue and security cooperation, it helps to reassure regional partners,” the embassy said.

Officials at the Saudi embassy in Washington didn’t comment on the developments.

Congress and the U.S. defense industry were informed of the review in recent days, one U.S. official said. It isn’t known how long the review will last.