MOSCOW—Russia said on Friday that it will withdraw from an international treaty allowing surveillance flights over military facilities after the U.S. exit from the pact, compounding the challenges faced by the incoming administration of president-elect Joe Biden. Russia’s Foreign Ministry said in a statement that the U.S. withdrawal from the Open Skies Treaty last year “significantly upended the balance of interests of signatory states,” adding that Moscow’s proposals to keep the treaty alive after the U.S. exit have been cold-shouldered by Washington’s allies. The ministry said that Russia is now launching the relevant procedures to withdraw from the pact “due to the lack of progress in removing the obstacles for the treaty’s functioning in the new conditions.” The Russian parliament, which ratified the treaty in 2001, will now have to vote to leave it. The treaty was intended to build trust between Russia and the West by allowing the accord’s …