New Delhi, April 30 -- Ukraine used interceptor systems to shoot down more than 33,000 Russian drones of various types in March, a record monthly figure since Moscow launched its all-out invasion more than four years ago, Ukraine's defense minister claimed.

Meanwhile, Ukraine's domestically developed long-range attack drones struck a Russian oil refinery and terminal on the Black Sea for the third time in less than two weeks, prompting the evacuation of local people and a Russian warning of possible "environmental consequences."

Ukraine has developed cutting-edge and battle-tested drone technology that has proved essential in holding back Russia's bigger army and has drawn military interest from around the world.

Interceptor drones as ...