Estonia’s foreign ministry has summoned the Russian chargé d’affaires over the incident. Russian intelligence was responsible for an arson attack on a drone plant in Tallinn in August, Estonian Prime Minister Kristen Michal has said. A fire broke out on August 15 at a production facility used by defense contractor Milrem Robotics, which makes unmanned ground systems, including for the Ukrainian military. Estonian authorities quickly said the blaze was arson and began investigating whether Russia was behind the attack. Latvian security services later arrested three suspects, all Latvian citizens. Based on investigative evidence gathered by the Estonian Internal Security Service (KAPO), authorities can now state “with full confidence” that the arson was an act of sabotage commissioned by Russian intelligence, Prime Minister Michal said on Tuesday. The Kremlin has denied any connection with the incident, describing the accusations as unfounded and saying it would not take them seriously, Reuters reported. ‘Dangerous escalation’ Estonia’s foreign ministry has summoned Russia’s chargé d’affaires over the incident. Foreign Minister Margus Tsahkna described the attack as part of a broader pan-European campaign by Moscow aimed at undermining support for Ukraine and dividing allies. French President Emmanuel Macron said Estonia's findings marked a "dangerous escalation" by Moscow and warned the Kremlin its strategy would not succeed. "The multiplication of these hostile acts represents a dangerous escalation by Russia, which will only lead it into a dead end," the AFP news agency quoted Macron as saying. "Russia needs to know that it will not overcome our unity or our determination to continue supporting Ukraine." Sweden's prime minister, Ulf Kristersson, described the matter as "extremely serious" and said Stockholm stood fully behind Tallinn.