‘Possibility…’: Zelensky doesn’t rule out chemical weapons use in Mariupol

• The Organisation for the Prohibition of Chemical Weapons, world's chemical weapons watchdog, said it was "concerned" over reports of the use of chemical weapons in the besieged Ukrainian port of Mariupol. Reports first emerged Monday from Ukraine's Azov battalion that a Russian drone had dropped a "poisonous substance" on troops and civilians in Mariupol. DW correspondent Jan-Philip Scholz reports from Odesa on the latest about the chemical attack allegations in Mariupol. Watch this video for more details.