Is Ukraine conducting a sabotage campaign inside Russia?

A deadly fire at an aerospace research institute in Tver, northwest of Moscow. Another blaze at a munitions factory in Perm, more than 1,100 kilometers (680 miles) to the east. And fires in two separate oil depots in Bryansk, near Belarus.

Coincidences, or a sign that Ukrainians or their supporters are mounting a campaign of sabotage inside Russia to punish Moscow for invading their country?

Since the blaze at the Central Research Institute of the Aerospace Defense Forces in Tver on April 21, which killed at least 17 people, social media has leapt on every report of a fire somewhere in Russia — especially at a sensitive location — as a sign that the country is under covert attack.

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https://www.msn.com/en-ca/news/world/is-ukraine-conducting-a-sabotage-campaign-inside-russia/ar-AAX2fLF?ocid=mmx&PC=EMMX01