local time.The Air Force warned of the threat of Russian cruise missiles and Shahed-type drones, as air raid alerts became active across the country. Polish and other allied aircraft were scrambled to protect the country's own airspace in response to reports of the Russian missile attacks, the Operational Command of Poland's Armed Forces said on X.No information is currently available on any damage to infrastructure and no casualties were reported at 4 a.m. local time.Air raid alerts were turned off at 4:45 a.m. In recent months, Russia has intensified its attacks against Ukraine's critical infrastructure in a renewed assault against the country's energy grid.As a result of the attacks on energy infrastructure, Ukraine began implementing rolling shutdowns on May 15, but they have dramatically increased in recent days.Worst-case scenario in Ukraine’s energy system ‘very close to realistic,’ largest private energy company saysUkrainians could face up to 20 hours of blackouts a day under a “worst-case” scenario if the country cannot repair and properly defend its energy infrastructure from Russian attacks, Executive Director of Ukraine’s largest privately-owned energy company DTEK Dmytro Sakharuk told the Kyiv Independent…The Kyiv IndependentLiliane Bivings