Russian forces conducted strikes on Kyiv and eight other regions for more than 12 hours overnight into Tuesday, killing at least 12 people and wounding more than a dozen including three children, according to PBS NewsHour. The attacks occurred on the sixth consecutive day of heavy strikes and coincided with the return of millions of Ukrainian schoolchildren to classes for their fifth wartime school year. Ukrainian President Zelenskyy separately warned that Russian airspace could effectively close due to drone threats, per euronews.com and Bloomberg.