Satellite imagery of a Russian air base taken shortly after Ukraine carried out a drone attack deep inside Russia over the weekend shows several strategic bombers were destroyed and badly damaged, according to three open source analysts.

Ukraine targeted at least four air bases across Russia using 117 unmanned aerial vehicles launched from containers close to the targets. Drone footage of the operation verified by Reuters shows several aircraft were struck in at least two locations.

Capella Space, a satellite company, supplied Reuters with an image of one of those airfields, located in the Siberian region of Irkutsk. The image was taken on June 2, the day after one of the most complex and effective operations launched by Ukraine in more than three years of war.

Cloud cover can obscure conventional satellite pictures, but the data is from synthetic aperture radar (SAR) satellites which direct energy beams at the Earth and detect echoes, making it possible to identify small topographical details.

The image - more grainy than conventional high-resolution photographs and in black and white - appears to show the debris of several aircraft located along the runway of the Belaya military air base or parked in protective revetments nearby.

“Based on the debris visible, comparison to recent satellite images and released drone footage from Telegram posted to Twitter, I can see the destruction of several aircraft,” said John Ford, a research associate at the California-based James Martin Center for Nonproliferation Studies.

Ford said that SAR imagery provided to him by Reuters showed what appeared to be the remnants of two destroyed Tu-22 Backfires - long-range, supersonic strategic bombers that have been used to launch missile strikes against Ukraine.

The SAR image, as well as drone footage of the strikes posted on social media, also indicated that four strategic Tu-95 heavy bombers had been destroyed or severely damaged, he added.

Brady Africk, an open source intelligence analyst, agreed that the SAR imagery of Irkutsk air base showed several Tu-95s and Tu-22s had been destroyed and damaged, although more imagery was needed to properly assess the impact.

“But it is clear that the attack on this airbase was very successful,” he said.

“The aircraft targeted in the attack were a mix of Tu-22 and Tu-95 bombers, both of which Russia has used to launch strikes against Ukraine.”

Africk added that Belaya air base is home to several flat decoy aircraft, which he said had apparently failed to mislead Ukrainian drones in this case.

LARGE EXPLOSION

Reuters has not yet obtained SAR imagery of the Olenya airfield, a base in Murmansk in Russia’s far northwest that was also attacked.

But drone video footage of Olenya base provided by Ukrainian authorities and verified by Reuters showed two burning bombers which appeared to be Tu-95s and a third, also a Tu-95, being hit by a large explosion.

The Russian Defence Ministry said Ukraine had launched drone strikes targeting military airfields in Murmansk, Irkutsk, Ivanovo, Ryazan, and Amur regions. Air defences repelled the assaults in three regions, but not Murmansk and Irkutsk, it said, adding that in those places several aircraft caught fire.

The Kremlin said on Tuesday that Russia had launched an official investigation into the weekend Ukrainian drone attacks.

Top Russian security official Dmitry Medvedev also said, in an apparent response to the strikes on Russian strategic bomber bases, that Moscow would take revenge. “Retribution is inevitable.”

Ukraine’s domestic security agency, the SBU, has claimed responsibility for the operation, called “Spider’s Web”, and said that in total 41 Russian warplanes were hit.

Ukrainian President Volodymyr Zelenskiy called the attack, which struck targets up to 4,300 km (2,670 miles) from the frontlines of the war, “absolutely brilliant”.

The Ukrainian military initially added 12 aircraft to its running tally of Russia’s wartime military losses on Tuesday.

“After processing additional information from various sources and verifying it ... we report that the total (Russian) losses amounted to 41 military aircraft, including strategic bombers and other types of combat aircraft,” it added in a later update. There was no immediate public response from Moscow to the SBU statement.

The SBU said the damage caused by the operation amounted to $7 billion, and 34% of the strategic cruise missile carriers at Russia’s main airfields were hit.

Reuters could not independently verify the claims.

Some experts said the operation would not be enough to stop Russia from launching missile attacks on Ukraine using strategic bombers, but it would be hard, if not impossible to replace the damaged planes because some of them are no longer in production.

The attack was also likely to force Russia to reconfigure its air defences, according to the Institute for the Study of War (ISW) research group.

“The ... operation will force Russian officials to consider redistributing Russia’s air defence systems to cover a much wider range of territory and possibly deploying mobile air defence groups that can more quickly react to possible similar Ukrainian drone strikes in the future,” the ISW said.