Russia’s military carried out a flight test of a new multi-warhead intercontinental ballistic missile on Monday amid growing tensions with the United States over the crisis in Ukraine.

The SS-27 Mod 2 road-mobile ICBM was launched around 2:40 a.m. EST from Russia’s Plesetsk launch facility, located about 500 miles north of Moscow.

“The main purpose of the launch is to validate the reliability of a batch of this class of missiles made at the Votkinsk Plant,” Defense Ministry spokesman Igor Yegorov told state-run Interfax-AVN.

An unspecified number of simulated nuclear warheads landed at an impact range on the Kura test range on the Kamchatka Peninsula, in the Russian Far East, Yegorov said. The distance is around 3,500 miles.

The SS-27 Mod 2 is Russia’s newest ICBM and has been touted by Russian officials as designed specifically to defeat U.S. missile defenses.

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