Crisis deepens, Ukraine accuses Moscow of ‘medieval’ tactics

The humanitarian crisis in Ukraine deepened Monday as Russian forces intensified their shelling and food, water, heat and medicine grew increasingly scarce, in what the country condemned as a medieval-style siege by Moscow to batter it into submission.

A third round of talks between the two sides ended with a top Ukrainian official saying there had been minor, unspecified progress toward establishing safe corridors that would allow civilians to escape the fighting. Russia’s chief negotiator said he expects those corridors to start operating Tuesday.

But that remained to be seen, given the failure of previous attempts to lead civilians to safety amid the biggest ground war in Europe since World War II.

Well into the second week of the invasion, with Russian troops making significant advances in southern Ukraine but stalled in some other regions, a top U.S. official said multiple countries were discussing whether to provide the warplanes that Ukrainian President