Moscow: Two people were killed and four others injured in a liquid propellant jet engine blast at a military test site in Russia's northern Arkhangelsk region, officials said.
"During testing of a liquid jet engine an explosion and combustion of the product occurred," said a statement by the Defence Ministry carried by a Russian news agency.
"There have been no harmful chemicals released into the atmosphere, the radiation levels are normal," it added.
Emergency aircraft were used to airlift the injured. They included Defence Ministry officials and developer company representatives, who "had injuries of varying severity", according to the statement cited by the BBC.
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There had been earlier reports of a fire at a military facility near Nyonoksa town in the same region, which hosts a Navy missile test range known to be used for testing intercontinental ballistic missiles, or ICBMs.
