Analysts said Ukraine appeared to be exploiting gaps in Russian air defenses.
Russia's air defenses are focused on potential attacks from NATO in the west, not the south.
AdvertisementUkraine is exploiting gaps in Russia's air defenses, which were designed for a different kind of war, according to a report.
The Institute for the Study of War, a US think tank, said that Russian air defenses in Leningrad Oblast, near St Petersburg, appeared to be poor.
AdvertisementThe ISW said the attacks were stretching Russia's air defenses.
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—, Russia's
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Analysts, NATO, Service, Ukrainian, Reuters, Business
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Ukraine, US, Leningrad Oblast, St Petersburg, West, Ust, Tula, Moscow, Russia, Klintsy, Ukrainian, Crimea