LYSYCHANSK, Ukraine — All of the bridges connecting the twin Ukrainian cities of Lysychansk and Sievierodonetsk are destroyed and street-by-street fighting is raging, leaving thousands of civilians largely trapped inside one of the deadliest battles of the war so far.
Russia has targeted the area since its full-scale invasion began in February, but as it has narrowed its offensive to the resource-rich eastern Donbas region, Russian commanders have steadily redirected more forces to the…