The Foreign Secretary has vowed to hold Vladimir Putin "and his regime to account" if it is proven Russian forces used chemical agents in an attack on Mariupol.
Liz Truss tweeted: "Reports that Russian forces may have used chemical agents in an attack on the people of Mariupol. We are working urgently with partners to verify details.
"Any use of such weapons would be a callous escalation in this conflict and we will hold Putin and his regime to account."
