As convoy approaching Ukrainian capital appears stalled, Russia unleashes greater firepower

DNIPRO, Ukraine — Russia intensified strikes on cities across Ukraine on Tuesday, but the advance of foreign forces ground to a halt outside Kyiv as local troops and volunteers steeled themselves for a fierce battle for the capital.

U.S. and British officials said a long column of tanks and combat vehicles was stalled roughly 20 miles north of central Kyiv on the sixth day of President Vladimir Putin’s invasion, deepening questions about whether Moscow’s assault will yield a protracted war of resistance with its much smaller, less powerful neighbor.