Vladimir Putin has tested nuclear-capable missiles in what will be seen as a major threat to the West.
Russian troops practised the simulated "electronic launches" of nuclear-capable Iskander mobile ballistic missile systems in the western enclave of Kaliningrad, in the Baltic Sea between Poland and Lithuania, the defence ministry said in a statement.
Forces practised single and multiple strikes at targets imitating launchers of missile systems, airfields, protected infrastructure, military equipment and command posts of a mock enemy, the statement said.
Personnel then carried out a manoeuvre to change their position in order to avoid "a possible retaliatory strike", the defence ministry added.
However, no actual missiles were fired during the simulator tests.
During the tests, military units, which involved over 100 troops, are also said to have practised "actions in conditions of radiation and chemical contamination".
Vladimir Putin's cronies' brazen threats of razing Britain to the ground with nuclear missiles show how unrestrained Russian state pundits feel while the Kremlin continues with its aggression towards the West.
It comes as Putin's war rolls on in Ukraine, with Kremlin-controlled TV presenters repeatedly threatening Britain and simulating the absolute destruction a nuke would cause to the UK.
Presenters on one of the country's most widely watched programmes, Russia One, drew up maps showing the resulting blast radius if atomic weapons hit three European cities, including London.
And more recently Putin stooge Dmitry Kiselyov - also known as the president's "mouthpiece" - warned an underwater torpedo nuke hitting the UK would produce a 500m-high tsunami and leave the isles a "radioactive desert".
Retired army officer and security analyst, Tom Clonan, told Newstalk Breakfast these "horrific threats" are a clear sign of just how "disinhibited" Putin's cronies feel as the Kremlin continues to uphold its aggressive stance against the West.
In one report Kiselyov boasted of the destructive power of his country's nuclear arsenal in front of a graphic simulation of an underwater missile being detonated along the coast of northwest Ireland.
Kiselyov bragged: "It approaches its target at a depth of 1km at a speed of 200km/h.
“There's no way of stopping this underwater drone. The warhead on it has a yield of up to 100 megatonnes.
"The explosion of this thermonuclear torpedo by Britain's coastline will cause a gigantic tsunami wave up to 500m high.
"Such a barrage alone also carries extreme doses of radiation. Having passed over the British Isles, it will turn what might be left of them into a radioactive desert.”