MOSCOW, March 5. /TASS/. Russia’s military have put into service a long-range missile for the S-300V4 air defense system, a source in the country’s Defense Ministry told TASS on Thursday.

"The missile range reaches 400 kilometers [250 miles]," the source said.

The new missile successfully passed the state tests late last year, he said. First, the S-300V4 systems in the Western military district are to be equipped with these missiles, the source added.

The supplies of S-300V4 systems to Russia’s Ground Forces began only in 2014. The servicemen received two division sets of these systems which are considered to be more efficient than their predecessors by up to 2.5 times.

Late last year, the press service of the Almaz Antey air defense systems manufacturer told TASS the new longer range missiles for the S-300V4 systems were being developed, giving no further details.