Ukraine has hit the warehouses of Russia's largest online retailer Wildberries -- Moscow's equivalent of Amazon -- at least three times in a week, killing several employees, causing fires and business losses. Here is what we know about Wildberries and how it became a target for Ukraine -- which has intensified retaliatory strikes on Russia in the fifth year of the war. On Wednesday, Kyiv's drones targeted two other Wildberries warehouses and logistics centres in southern Russia, killing one person and sparking evacuations. And on Friday, Kyiv hit Wildberries warehouses outside Saint Petersburg and in Moscow-annexed Crimea. - Russia's richest woman -Wildberries and its rival Ozon are the most popular courier services in Russia.