KYIV, Ukraine: Russian airstrikes targeting energy and other facilities rocked Ukraine from east to west Tuesday, causing broad power blackouts. A senior official warned that the situation was 'critical' and urged Ukrainians to 'hang in there' as neighborhoods went dark.

The aerial assault, which resulted in at least one death in a residential building in the capital, Kyiv, followed days of euphoria in Ukraine sparked by one of its biggest military successes in the nearly nine-month war — the retaking last week of the southern city of Kherson.