A group of senators is planning to force a vote this month to block a $1.15 billion arms sale to Saudi Arabia.

Sens. Rand Paul Randal (Rand) Howard PaulSecond GOP senator to quarantine after exposure to coronavirus GOP senator to quarantine after coronavirus exposure The Hill's Morning Report - Sponsored by National Industries for the Blind - Trump seeks to flip 'Rage' narrative; Dems block COVID-19 bill MORE (R-Ky.), Chris Murphy Christopher (Chris) Scott MurphyDemocratic senator calls for 'more flexible' medical supply chain to counter pandemics The Hill's 12:30 Report - Presented by Facebook - Don't expect a government check anytime soon GOP chairman to release interim report on Biden probe 'in about a week' MORE (D-Conn.), Al Franken Alan (Al) Stuart FrankenGOP Senate candidate says Trump, Republicans will surprise in Minnesota Peterson faces fight of his career in deep-red Minnesota district Getting tight — the psychology of cancel culture MORE (D-Minn.) and Mike Lee Michael (Mike) Shumway LeeMcConnell shores up GOP support for coronavirus package McConnell tries to unify GOP Davis: The Hall of Shame for GOP senators who remain silent on Donald Trump MORE (R-Utah) introduced a joint resolution of disapproval on Thursday that, if passed, would undercut a planned sale of tanks and related equipment.

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Paul said in a statement that selling the military equipment to Saudi Arabia "is a recipe for disaster and an escalation of an ongoing arms race in the region."

Senators are using a little-known loophole in the Arms Export Control Act (AECA) to bring the resolution to the floor.

Under the AECA, senators have to give a Senate committee 10 calendar days to take up the resolution before they can bring it back to the Senate floor. Under that timeline, the earliest the senators could force a vote is Sept. 19.

The State Department approved the sale last month. A Saudi-led coalition has been fighting the Houthis, Iran-backed Shiite rebels in Yemen, but lawmakers are concerned the equipment will be used in missions that kill civilians and worsen the country's humanitarian crisis.

Murphy added that the war in Yemen "has become a disaster that is making our country less safe every day."

“Thousands of civilians are being killed, and terrorist groups inside the country, like al Qaeda and [the Islamic State in Iraq and Syria], are getting stronger. Until the Saudis conduct changes, the U.S. should put a pause on further arms sales," he said.

Thursday's resolution comes after 64 House lawmakers sent a resolution to President Obama last month asking that he delay the sale. Murphy and Paul also introduced an amendment to an annual defense policy bill to bolster congressional oversight of military sales to Saudi Arabia.

Also this week, the House is set to vote on another controversial measure involving Saudi Arabia. It would allow the families of 9/11 victims to sue the country's leaders.