MOSCOW (Reuters) -Russian air defences repelled an attack by four drones flying towards Moscow, Mayor Sergei Sobyanin said on Friday, with no injuries reported in the capital or in an earlier attack on an oil complex in one of Russia's southern regions.

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.

Ukraine on Tuesday launched its biggest ever drone attack on Moscow and the surrounding region, killing at least three employees of a meat warehouse, injuring 17 others and causing a short shutdown at the Russian capital's four airports,

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

Kiev’s latest attack comes after a US envoy’s visit to discuss ceasefire talks proposed by Washington. Moscow has repelled another Ukrainian drone attack, just days after the Russian capital was targeted in a major multi-wave raid involving over 90 UAVs that killed three civilians,

Ukraine targeted Moscow early on Tuesday in what seemed its biggest drone attack of the war on the Russian capital, killing at least one person, sparking fires and suspending air and train transport in the region,

The Ministry of Emergency Situations of Russia has issued instructions according to which civilians "in no case should", in particular, "shoot down drones with improvised objects and other means," as well as use "radio equipment and mobile phones and GPS devices near the drone.

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.