A nuclear missile test caused an explosion at a Russian northern military base, according to a statement released by the Russian Atomic Agency (Rosatom) on Saturday.
Rosatom said five employees died as a result of a test on Thursday morning involving “isotopic sources of fuel on a liquid propulsion unit” in Severodvinsk town in Arkhangelsk.
Russian Defense Ministry said the explosion did not result in nuclear contamination, which Rosatom also confirmed.
Earlier this week a series of explosions thundered an ammunition depot in Achinsk town in Siberia, killing one person.
By Elena Teslova in Moscow