The assault, which the mayor called the largest on Russia’s capital since the war began, was a reminder of Ukraine’s power to strike as its president proposes an air truce.

Russia said it was hit by a “massive” drone attack overnight Tuesday, hours ahead of critical talks between officials from Washington and Kyiv.

Russian air defenses shot down over 300 Ukrainian drones over 10 Russian regions overnight, military officials said Tuesday, in what appeared to be the biggest Ukrainian drone attack on Russia in the three-year war.