This is a disturbing action. Not because it limits the ability to evacuate refugees from Chernihiv, because Russia doesn’t care about that. And not because it cuts off the ability to bring aid to Chernihiv, Russia likely views that as a route by which the city can also be resupplied militarily. The disturbing thing is that those bridges were also Russia’s route for bringing forces between Chernihiv and Kyiv.
‘This suggests that Russia’s first priority is reducing Chernihiv than any military action.