Multiple explosions rocked Kyiv and several other Ukrainian cities reported blasts and power outages on Monday morning, as Russia lashed out with a massive wave of violent airstrikes that carried echoes of the initial days of its invasion.A wounded Vladimir Putin, who has also seen weeks of Russian losses on the battlefield, had been under pressure to respond with force following the explosion, which Putin on Sunday blamed on Kyiv and described as an act of terror.“If attempts to carry out terrorist attacks on our territory continue, responses from Russia will be tough and will correspond in scale to the level of threats to the Russian Federation.” At least four explosions were heard in Ukraine’s capital during rush hour on Monday morning.A children’s playground was among the sites hit by a rocket or missile, according to Anton Gerashchenko, an adviser to the Minister of Internal Affairs of Ukraine, who tweeted images of a smoldering crater in the ground next to the site.Putin held an operational meeting of his Security Council on Monday, a day after he called the explosions on the Crimea bridge a “terrorist attack” and said the organizers and executors were “Ukrainian special services.” Kyiv has not claimed responsibility for the blast on the enormous 19-kilometer (about 12-mile) bridge, which was built after Moscow annexed Ukraine’s Crimean Peninsula in 2014, an annexation regarded by the West as illegal."