Investing.com -- Ukrainian drone attacks killed at least two people and struck a warehouse operated by Wildberries, Russia's largest online retailer, in regions along the Volga River overnight, Russian officials said, according to Reuters. Advertisement AdvertisementAdvertisement AdvertisementA separate drone strike hit a residential building in Engels, in the neighbouring Saratov region, killing two people, Governor Roman Busargin said. Saratov hosts a major oil refinery, and Engels is home to a military airbase that has faced repeated Ukrainian attacks. Strikes near oil refineries and other energy assets may also affect fuel production if attacks cause extended shutdowns, adding uncertainty to Russian energy exports and domestic supply. Related articlesUkrainian drone strikes kill two in Russia, hit Wildberries warehouseThese 2 stocks are best positioned to benefit from higher uranium prices: analyst5 reasons why Jefferies thinks Meta's pullback is a buying opportunity