"Russia is holding military exercises in Kaliningrad, and its scenario includes deployment of Iskander missile systems and the possibile use of them. We are aware of it," Lithuanian Foreign Minister Linas Linkevicius told AFP.
He said modified Iskander missiles had a range of up to 700 kilometres (440 miles) which means they could reach German capital Berlin from the Russian exclave, which is sandwiched between Poland and Lithuania.
Moscow also sent Iskanders to Kaliningrad in 2015 as part of a series of mammoth military drills amid heightened tensions with the West over Ukraine.
Linkevicius said that this time he thought Moscow was using the move to "seek concessions from the West".
Polish Defence Minister Antoni Macierewicz Saturday in Warsaw called Russia's "activities very alarming", but declined to say whether he knew about any fresh deployment of Iskanders to Kaliningrad.
Estonian media reported on Friday that Russia was shipping Iskanders on a civilian vessel in the Baltic sea.
Linkevicius declined to comment on the details.
Tensions between Russia and the West have escalated to their worst level since the Cold War in recent years after Russia annexed Crimea from Ukraine and launched a military campaign in Syria.
Since the start of the Ukraine crisis in 2014, Russia has flexed its muscles with a series of war games involving tens of thousands of troops in areas bordering NATO Baltic states.
NATO responded by agreeing to deploy four battalions in Poland, Lithuania, Latvia and Estonia as of next year to bolster its eastern flank. AFP reported.
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