The founder of a pro-Russian militia group in eastern Ukraine, described by authorities in Kyiv as a “criminal mastermind”, has died following a bombing in central Moscow, according to Russian state media.

Armen Sarkisyan, the founder of a separatist battalion fighting in eastern Ukraine, died after an explosion in an apartment complex, according to reports citing the Russian authorities.

A project to establish a court to prosecute the Russian leaders who orchestrated the invasion of Ukraine has taken a major step forward, with an announcement from a group of international organizations,