The battle for Mariupol: Allies call for probe after allegation of chemical weapons use

There are calls from the US and Britain for an investigation after Ukrainian soldiers of the Azov regiment were reportedly injured by a "poisonous substance" during another Russian assault on the port of Mariupol. No evidence has yet been gathered. The UK foreign secretary says it would be "a callous escalation" of the war. The Pentagon says it's "deeply concerning". Ukraine's President Volodymyr Zelensky has already expressed his fears that Russia could deploy chemical weapons in his country. 🔔 Subscribe to France 24 now: https://f24.my/YTen 🔴 LIVE - Watch FRANCE 24 English 24/7 here: https://f24.my/YTliveEN 🌍 Read the latest International News and Top Stories: https://www.france24.com/en/ Like us on Facebook: https://f24.my/FBen Follow us on Twitter: https://f24.my/TWen Discover the news in pictures on Instagram: https://f24.my/IGen