At about 18:00, the Telegram channel ChP Krym published photos of a large plume of black some rising reportedly over the Belbek military air base in occupied Crimea. Belbek is the home base of Russia’s 27th Composite Aviation Division.

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"Clouds of smoke over Liubymivka (the settlement closest to the Belbek air base, - Ed.). Eyewitnesses report that they've heard an explosion," the Telegram channel ChP Sevastopol wrote.
The so-called "governor of Sevastopol," Mikhail Razvozhaev, wrote on his Telegram channel at about 18:40:
"Regarding the situation at Belbek. During landing, a plane went beyond the runway, there was a partial explosion of ammunition. The pilot managed to eject. The fire was quickly extinguished, the airfield was not damaged."
Update:
The video confirms the version of the occupation authorities that a Russian military plane blew up outside the runway at Belbek after it ran past the runway:
Бельбек
Курящій літачок) pic.twitter.com/hSayicrSc3— RoksolanaКрымUA (@RoksolanaKrim) October 1, 2022