Russian President Vladimir Putin has sought to justify air strikes against civilian targets and power infrastructure in the Ukraine war as he sipped champagne during a lavish reception.Putin was referring to an explosion that took place on the Kerch bridge - which connects Crimea to Russia - on October 8, when a truck crossing it exploded and caused it to be partially destroyed.The Ukrainians have never claimed responsibility, but the Kremlin was quick to point fingers toward Kyiv.The reference to Kursk appears to reference Russia's announcement that an airfield in the Kursk region, which neighbours Ukraine, was targeted in a drone attack.Local Russian authorities in Donetsk — which Putin claimed to annex in defiance of international law — have reported frequent shelling of the city this week."