Punjab, Oct. 22 -- Volodymyr Zelensky has accused Russia of using cluster warheads in deadly strikes that came shortly after negotiations to end the war collapsed in St Petersburg. US envoy Steve Witkoff then met Putin in Russia, and Moscow suggested talks could resume in November.

The sequence

Talks in St Petersburg, involving the United States, ended without agreement. Strikes followed within a short window. Zelensky's charge is that they used cluster munitions.

That accusation is specific and it matters. Cluster warheads scatter submunitions across a wide area, a proportion of which fail to detonate and remain lethal for years - which is why more than a hundred states have banned them. Neither Russia nor Ukraine is party to that conve...