Meanwhile, Ozon employees in Adygeysk, in the Adygea area, and Nevinnomyssk, in the Stavropol area, have been evacuated.

Videos posted on social media of the Ozon attacks have been verified by the BBC. One reveals a drone hitting a warehouse in the Orenburg area, while another reveals a giant plume of smoke and flames rising from its warehouse in Dagestan.

Shares in Ozon fell by as much as 12% on the Moscow Exchange on Monday morning, while shares in its main shareholder, personal fairness agency AFK Sistema, fell by nearly 13%.

When requested on Monday whether the Russian authorities would present state support to Ozon, the Kremlin said it was “working with business representatives to develop various options for providing support in this difficult situation”.

The in a single day strikes comes a day after Ozon’s web site in the Samara area was hit. The firm said a quantity of its employees had been injured.

Following that strike, Ukraine’s defence ministry said on Saturday: “Systematic strikes on dual-use goods storage centres complicate the enemy’s logistics and negatively affect the Russian economy as a whole.

“After Ukrainian items hit 15 of the largest logistics hubs of Wildberries, it was Ozon’s flip.”

Meanwhile, in Ukraine’s Odesa region, overnight strikes targeted food storage facilities and energy infrastructure leading to five people being injured, the region’s head Oleg Kiper said on Telegram.

Founded in 1998, Ozon is one of Russia’s first online retailers. The company is second only to Wildberries in terms of scale and presence, with its pick-up posts and delivery boxes stationed across the country.

Both the Ozon and Wildberries logos are often seen together in Russia at shared pick-up points.

The targeting of these online retailers has had the effect of bringing the war closer to ordinary Russians.

Both companies have been described as “Russia’s Amazon” and it is estimated that they are used by 85-90% of Russia’s economically active population.

In many remote places lacking accessible shops, Russians depend on them for much of their clothes and household appliances.

But unlike Amazon, which sells goods directly alongside its marketplace business, Wildberries and Ozon act almost entirely as marketplaces, connecting independent sellers with buyers across Russia, storing and delivering their goods and handling payments.

This means many of the losses incurred in the attacks have been borne by those businesses.

The Kremlin has denied that on-line platforms are used for military provides.