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.

The defense ministry said it intercepted and destroyed 85 Ukrainian drones overnight in several regions of the country.

At least seven people were injured in a Ukrainian drone attack on Russia’s Tambov region overnight on Saturday, according to local authorities.

Russia was once again in flames today as a suspected Ukrainian drone strike' devastated a chemical plant in Vladimir Putin ’s home city of St Petersburg, leaving a "pillar of fire". Huge repeated explosions were heard at the facility in Gatchina - which makes acetone that can be used for military explosives and rocket fuel.

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.