Russian e-commerce giant Ozon said four of its logistics hubs in southern Russia were targeted by Ukrainian drones on Monday, as Kyiv expanded a campaign aimed at disrupting Moscow's commercial supply networks.

A fire broke out at an Ozon centre in Makhachkala, the capital of Russia's Dagestan region, after a drone attack at around 05:00 local time, the company said.

Several people were wounded but their lives were not in danger, according to Ozon, which said the facility had suspended operations.

A large fire was also reported at an Ozon logistics centre in Enem, in the Krasnodar region, although staff were evacuated and no casualties were reported.

Warehouses in Adygeysk and Nevinnomyssk were also evacuated because of the threat of drone attacks but escaped damage.