Russian An-72 military transport aircraft explodes at airfield near Moscow – intelligence video
https://news.liga.net/en/politics/video/russian-an-72-military-transport-aircraft-explodes-at-airfield-near-moscow-intelligence-video
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Further excerpts from article mention other guerrilla or special forces activity happening recently:
"Overnight on November 9, a Russian Mi-24 attack helicopter was burned at an airbase near Moscow.
On December 13, a destructive fire in Krasnodar disabled three Russian railway locomotives. The following day, a Russian Su-30 fighter jet was destroyed in a fire at an airbase in Krasnodar Krai.
On December 15, military intelligence reported that railway tracks were blown up in Ulyanovsk, Russia, complicating logistics for the Russian army.
On December 19, DIU reported that underground fighters in Novosibirsk, Russia, set fire to fuel depots of the Russian army."