U.S. Intelligence Stresses Risks in Allowing Long-Range Strikes by Ukraine

U.S. intelligence agencies believe that Russia is likely to retaliate with greater force against the United States and its coalition partners, possibly with lethal attacks, if they agree to give the Ukrainians permission to employ U.S., British and French-supplied long-range missiles for strikes deep inside Russia, U.S. officials said.

The intelligence assessment, which has not been previously reported, also plays down the effect that the long-range missiles will have on the course of the conflict because the Ukrainians currently have limited numbers of the weapons and it is unclear how many more, if any, the Western allies might provide.

The assessment highlights what intelligence analysts see as the potential risk and uncertain rewards of a high-stakes decision that now rests with President Biden, who met with President Volodymyr Zelensky of Ukraine at the White House on Thursday.

The findings may help explain in part why the decision has been so difficult for Mr. Biden to make, and show the internal pressures on him to say no to Mr. Zelensky’s request. U.S. officials, who spoke on condition of anonymity to discuss intelligence matters and internal deliberations, said it remained unclear what Mr. Biden would decide to do.

Mr. Zelensky has publicly and privately lobbied for the authority to use the missiles to bring the war to Russia.

Russia’s president, Vladimir V. Putin, has frequently employed threats to deter the United States and its coalition partners from providing more advanced weapons systems to the Ukrainians.