Estonia has accused Russia of violating its airspace for the fifth time this year and has delivered a formal protest to the Russian ambassador in Tallinn, the Estonian military said Friday.
A Su-27 fighter aircraft entered Estonian airspace without permission or identification and remained near the Baltic island of Vaindloo for less than a minute, the Estonian army said.
Citing inside sources, Estonian radio reported that Russia was planning to install an Iskander-M ballistic missile system in the Russian exclave of Kaliningrad, which is sandwiched between Baltic NATO and EU members Poland and Lithuania.
The report claimed that the short-range missile system was already en route from St Petersburg to Kaliningrad, formerly known as Koenigsberg in Prussian times, in a civilian transport ship.
There was no immediate official statement from Russia on the report.
Russia has frequently threatened that it would place a missile system in Kaliningrad, right on the EU and NATO's doorstep. The Iskander missiles have a range of more than 400 kilometres.