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.

Armen Sargsyan, the leader of a paramilitary unit wanted by Ukraine, died from his injuries following an explosion on Monday morning.

An east Ukrainian crime boss and separatist wanted by Kyiv was killed with one other person in a blast at a luxury residential complex in Moscow on Monday, Russian media reported. Armen Sarkisian, a known mafia boss from east Ukraine who had formed a battalion to fight against Kyiv, is the latest target in a string of explosions on Russian soil.

A pro-Russian paramilitary leader from eastern Ukraine, Armen Sarkisyan, was killed when a bomb tore through parts of a luxury apartment block in Moscow, state news agency TASS and other Russian media reported.

Armen Sargsyan, the leader of a pro-Russian paramilitary group in eastern Ukraine, died in a hospital after he was injured in an explosion in Moscow on Monday, Russian officials said.

An explosion rocked an upscale residential block in Moscow early Monday, killing two people – including the founder of a battalion that battled Kyiv’s forces in eastern Ukraine -- and injuring three others,

A mysterious explosion occurred in a residential building in Moscow, resulting in one death and four injuries. Investigators are examining the circumstances surrounding the incident. An explosion took place in a residential building in the northwestern part of Moscow,