Ukraine probes claim poisonous substance dropped in Mariupol
By YURAS KARMANAU and ADAM SCHRECK KYIV, Ukraine (AP) — Ukraine investigated a claim that a poisonous substance was dropped on besieged Mariupol, as Western officials warned Tuesday that any use of chemical weapons by Russia would be a serious escalation of the already devastating war. Thwarted in his apparent ambition to overrun the Ukrainian…
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