Russia-Ukraine live news: Ukraine says Russia using banned bombs

Phosphorus munitions used by Russian forces in the besieged eastern town of Kramatorsk

US President Joe Biden says Russia’s President Vladimir Putin is weighing the use of chemical weapons in Ukraine.

The Pentagon says it will help gather evidence of “war crimes” in Ukraine, accuses Russian forces of indiscriminate attacks.

Ukraine’s President Volodymyr Zelenskyy again calls for direct talks with Putin, says he is prepared to discuss dropping Kyiv’s NATO plans, Qazet.az reports.

A new curfew is in effect in Kyiv, lasting until Wednesday morning, after the mayor had warned that more Russian shelling of the Ukrainian capital was likely.