Fiber-optic drones popped up on the battlefields of Ukraine last year, and are set to become more popular on both sides in 2025.

Ukraine claimed Saturday to have struck one of Russia’s largest oil refineries in a drone attack, starting a fire at the facility more than 700 miles into Russian territory.

Authorities in Russia's Saratov Oblast have claimed that a fuel fire at the Engels oil depot has been brought under control on the fifth day following a drone attack. Source: Current Time TV, a Russian-language Radio Liberty project Details: The fire at the oil depot,

The oil depot in Engels, Saratov region, Russia, attacked by Ukrainian forces, continues to burn. The fire has been ongoing for the fifth day, according to the governor of the Saratov region, Roman Busargin.

The area of the fire has been reduced by 80%, and the amount of smoke has reportedly decreased, said the governor. However, the combustion of fuel continues. Read also: State of emergency in Russia’s Engels after Ukrainian drone strike Russian social media reported explosions and a fire near the oil depot in Engels,

A drone strike reportedly hit the Taneko oil refinery in Tatarstan, Russian Telegram channel ASTRA reported on Jan. 11.