Ukrainian strike kills three in Crimea after Kyiv targets St. Petersburg energy, military sites

A Ukrainian strike killed at least three people in Crimea, Moscow-installed authorities said on Thursday, a day after Kyiv targeted energy and military facilities in Saint Petersburg during Russia's flagship economic forum. US Secretary of State Marco Rubio warned of a "real" risk of escalation, while Ukraine described the attacks as justified retaliation for intensified Russian strikes on its territory.