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.

Ukrainian drones targeted Moscow for a second time this week, with city authorities saying early Friday that air defense systems downed four unmanned aircraft near the Russian capital. Moscow Mayor Sergei Sobyanin said emergency crews were dispatched to areas where debris from the intercepted drones had fallen.

Moscow witnessed a major aerial attack as Ukraine launched a fresh wave of drones, targeting key locations within the Russian capital. One of the drones hit a building just 4 kilometers from the Kremlin,