Estonia is closing its border with Russia following attempted arson attack on defence company, carried out on orders of GRU

From 1 December, Estonia is closing all border crossing points on its border with Russia. The Estonian authorities took this decision following an arson attempt at a defence facility in the country, carried out on behalf of the Russian GRU.
Estonian Foreign Minister Margus Tsahkna announced this on social media platform X, according to Censor.NET.
The reason for the closure of the border with Russia from 1 December
"Having received clear evidence that Russian military intelligence (the GRU) had ordered a sabotage operation against an Estonian defence company, Estonia will close all border crossing points on the Estonian-Russian border from 1 December," wrote the Estonian foreign minister.
He emphasised that Russia must understand that hostile actions against Estonia will have consequences. Tsahkna also gave an assurance that "attempts to intimidate, destabilise or undermine our security will not go unanswered".
"Closing the border crossing points will limit Russia’s ability to carry out hostile activities in Estonia and strengthen our efforts to prevent sanctions from being circumvented. I have already informed my colleagues in Finland, Latvia and Lithuania of this decision," added the Estonian Foreign Minister.