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, a pro-Russian collaborator from Donetsk Oblast wanted by Ukraine, died in the hospital after being injured in an explosion in an elite residential complex in Moscow on Feb. 3, the state news agency TASS reported,

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.

Russian security forces allege Ukraine's role behind the bomb blast in Moscow. Sarkisyan, a pro-Russian leader, was on the wanted list of Kyiv for a long time

A bomb explosion that killed a pro-Kremlin paramilitary leader from eastern Ukraine may have been a suicide attack, Russian media reported Tuesday, citing law enforcement sources. Armen Sarkisyan, founder of the Arbat Battalion,

Citing sources, the pro-state outlet Kommersant identified the victim as Armen Sarkisyan, a pro-Russian collaborator from Donetsk Oblast wanted by Ukraine. The injured victims reportedly include Sarkisyan's security guards.

Armen Sarkisyan has been described as a "crime boss" by Ukraine's SBU intelligence service. It said he was suspected of participating in and aiding "illegal armed groups" and had formed a pro-Russian military unit made up of local convict fighters.

The Monday bomb explosion that killed an ally of Russian President Vladimir Putin may have been a suicide attack, according to Russian media reports on Tuesday that cited law enforcement sources. Armen Sarkisyan,

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.

A Ukrainian separatist wanted by Kyiv was killed in a “carefully planned” explosion at a luxury apartment block in north-west Moscow on Monday.