Ukrainian drones struck a Russian fuel depot, oil pumping station and a refinery in an escalating campaign of strikes against energy infrastructure often hundreds of miles inside Russia.

By Anthony Deutsch IZIUM, Ukraine, May 31 (Reuters) - Roksolana Makar braved icy roads and the threat of drone strikes to interview a woman in the Ukrainian town of Izium who said Russian forces tortured her.

CBS's Margaret Brennan interviewed Ukrainian President Volodymyr Zelenskyy, a portion of which aired on "Face the Nation," where he asked the U.S. for more support with anti-ballistic missiles. MARGARET BRENNAN: Right.

Drone command centers, units, and operators are highly valuable targets, so Ukraine keeps them mobile and underground.

During an appearance on CBS News’ “Face the Nation” on Sunday, Connecticut Senator Chris Murphy stated that bipartisan efforts to support Ukraine are being stalled due to the influence of Donald Trump on Senate Republicans.

Ukraine’s campaign against Russian logistics is becoming more sophisticated. In addition to striking trucks, fuel depots and supply convoys, Ukrainian drones are reportedly dropping mines along key supply routes, forcing Russian forces to contend with threats from both the air and the road below.

Kyiv’s increased drone capabilities have offset the decrease in U.S. military aid.

"Russia attacked us by lots of ballistic missiles on our energy infrastructure, water supply, schools," he said.

Ukraine's defence intelligence is preparing a new drone to attack military facilities in Russia. These deep strike drones are able to fly up to 1,700 kilometres and can carry more than 75 kilograms of ammunition.