LVIV, Ukraine – (Reuters) – Civilians were fleeing from areas of eastern Ukraine on Tuesday ahead of an anticipated Russian offensive, while Kyiv said it was checking reports that Russian forces had used chemical weapons in the besieged port city of Mariupol.
The battle for Mariupol was reaching a decisive phase, with Ukrainian marines holed up in the Azovstal industrial district.
Should the Russians seize Azovstal, they would be in full control of Mariupol, the lynchpin between Russian-held areas to the west and east. The city has already been laid waste by weeks of Russian bombardments that have killed possibly thousands of civilians.
Deputy Defence Minister Hanna Malyar said the government was checking unverified information that Russia may have used chemical weapons while besieging Mariupol.
“There is a theory that these could be phosphorous munitions,” Malyar said in televised comments.
President Volodymyr Zelenskiy had said on Monday night that Russia could resort to chemical weapons as it amassed troops in the eastern Donbas region for a new assault on Mariupol. He did not say if they actually had been used.
The United States and Britain said they were trying to verify the reports. If Russia had used chemical weapons, “all options were on the table” in response, British Junior Defence Minister James Heappey said in London.
Chemical weapons production, use and stockpiling is banned under the 1997 Chemical Weapons Convention (CWC). Although condemned by human rights groups, white phosphorous is not banned under the CWC.