Three men have been killed in the Moscow region, in what is described as the largest drone attack on the Russian capital since the start of the full-scale war in Ukraine. A further 18 people, including three children, were injured, health officials told Russian media.

The dawn attack unfurled as U.S. officials were to meet a Ukrainian delegation in Saudi Arabia to seek an end of the three-year-war.

The pre-dawn attack came hours before scheduled talks between high-level delegations from Ukraine and the United States in Saudi Arabia.

The Russian defence ministry said 337 drones were intercepted over Russia and 91 of them were shot down over the Moscow region.

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.