Drones operating via fiber-optic wires are a new military challenge globally, as they are largely immune to jamming and interception attempts.

The claim by the General Staff of the Ukrainian armed forces, which came on a holiday celebrating Russia's sovereignty, is in line with Western intelligence estimates.

Ukraine's president says a new prisoner exchange with Russia is ongoing and will take days, as both sides continue launching hundreds of attack drones.

Trump redirects Kyiv’s 20,000 anti-drone missiles while Putin’s troops advance in Sumy - Russia ‘constantly spreading false information’ that they have entered Dnipropetrovsk, says Ukraine

Apart from drones, 20 missiles of various types were fired at different parts of Ukraine, according to the air force, which said the barrage targeted mainly central and western areas of Ukraine.

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Former Rep. Chris Stewart, a former fighter pilot, says the U.S. isn’t prepared for this change in modern warfare.