At least two people have been killed in an explosion at a military base used for missile tests in northern Russia.
In a statement, the country's defence ministry said the explosion occurred "during the test of a liquid propellant jet engine".
"As a result of the accident, six defence ministry employees and a developer were injured. Two specialists died of their wounds," it said.
It's the second accident to hit the Russian military in less than a week, after a fire broke out in an ammunition depot in Siberia on Monday.

Japan's record rains strand thousands at Narita airport; kill eight
Air India A320 briefly lost key flight controls, Airbus analysis shows
Philippine president says he has yet to decide who to back as successor
Wildfire descends on Croatian tourist town, injures 36
