THIS is the moment a Russian oil depot exploded in a huge fireball in yet another humiliating blow to Putin.
Plumes of black smoke could be seen rising into the sky in Vyborg after the explosion at the oil refinery near the Nato border with Finland.
Dramatic footage showed the oil depot engulfed in a raging inferno.
Leningrad regional governor Alexander Drozdenko denied a Ukrainian kamikaze drone had hit the facility.
He also denied there was a fire and claimed "there was a bang due to the use of pyrotechnics".
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But Kremlin-loyal media SHOT said the blast had shaken glass in the vicinity at 2.50am followed by "a plume of smoke and fire".
It is not immediately clear if it was a sabotage attack or a drone strike that sparked the blaze.
It marks another blow to Putin as Ukraine has been repeatedly targeting Russia's oil refineries in a bid to sabotage the despot's war machine.
In the last four months, Ukrainian forces have managed to hit almost two dozen oil depots, disrupting some 14 per cent of Russia's refining capacity.
Exports are in disorder and domestic prices have hiked - significantly damaging Putin’s economy.
The warmonger has faced even more humiliation as another attack overnight struck an oil depot in his favourite holiday spot where he boasts two palaces.
Explosions were heard in Slavyansk-on-Kuban, in Russia's southern Krasnodar region, with evidence of kamikaze drones blitzing the facility and forcing it to shut down.
More than 60 drones rained hell from above in the Black sea territory, with at least ten targeting Slavyansk, pro-Putin media outlet Mash reported.
“One of the downed drones crashed onto the territory of the oil refinery in Slavyansk-on-Kuban," the outlet wrote.
Russian defence ministry said 57 were downed across the Krasnodar region after a major onslaught by Ukraine.
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But dramatic footage captured the moment some Kamikaze drones broke through the defence and crashed on Tuapse oil refinery.
The double attack on the depot took Russian forces by complete surprise - and forced them to close the facility, calling an emergency.
A military airfield was also hit in the village of Kushchevskaya, in the same region with reports of a ship struck in naval port Sevastopol in annexed Crimea.
Nine ATACMS missiles and one UAV were launched over Crimea but Russia claimed it had intercepted the attacks.
However, Ukrainian navy confirmed they have overnight destroyed Russian Black Sea fleet minesweeper used to guide vessels through minefields.
It said in a Telegram statement: "Last night the Ukrainian Defence Forces destroyed the Russian Black Sea Fleet's Project 266-M Kovrovets minesweeper.
"The naval forces of the Ukrainian Armed Forces, together with their cpmrades, continue to bring us closer to Victory."
The damaged ship was reportedly towed away to a repair yard from Sevastopol bay, according to Crimean Wind channel.
The 200-ft long vessel with a crew of 68 was previously used by a Russian task force in Syria.
The Armed Forces of Ukraine have also blitzed war-torn Russian region of Belgorod.
Governor Vyacheslav Gladkov reported two casualties in the village of Petrovka as a result of the kamikaze drone attack.
In another unexplained incident, a cargo train suffered a serious derailment on the Trans-Siberian rail network in Krasnoyarsk region.
Five wagons were seen mangled on the line.
Ukraine has targeted Russian rail links which are used to transport arms supplies from North Korea.
A criminal probe was launched into today’s derailment.
The attacks on oil refineries came after the war's heaviest night of kamikaze drone bombardment by Ukraine on Russia.
Explosions lit up the sky on Friday in Novorossiysk and Sevastopol as over a hundred killer drones swarmed and blitzed three key ports.
Russia admitted it faced more than 100 drones in the overnight onslaught which came as Putin, 71, was on his official visit to China along with his new defence minister Andrey Belousov, 65.
Russia's defence has landed in hot water after reports confirmed that Ukraine's long-range MGM-140 ATACMS missiles destroyed at least four of Putin's prized warplanes - including MiG-31s and one Su-27.
The substantial destruction of the Belbek airbase in Crimea marked the biggest loss for Russia's warplanes since the start of Putin's illegal war against Ukraine.
It comes as Putin has launched his feared summer offensive against Ukraine as the Russian army has been gaining ground in Kharkiv.
The US is rushing military aid to Ukraine to ramp up its defence after Putin amassed more than half a million troops on the frontline.
