Estonia closes all checkpoints on the border with Russia from December 1 due to an incident of attempted sabotage at a defense plant.
"Russia must understand that hostile actions against Estonia carry consequences. Attempts to intimidate, destabilize or undermine our security will not remain unanswered. Closing the border crossings will reduce Russia's ability to conduct hostile activity in Estonia and strengthen our efforts to prevent the circumvention of sanctions," wrote the head of the Estonian Foreign Ministry.