Ukraine hit the "bold target" of a microelectronics plant close to Moscow's city center, a Ukrainian official said on Thursday.

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

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.

The number of Russian troops killed or wounded in Ukraine has topped 1 million, military officials in Kyiv said Thursday, describing the huge price that Moscow has paid for its 3-year-old invasion.

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.

Ukraine's president said the Biden administration had agreed to send the specialized anti-drone weapons, but they've been sent to the Middle East.

At least 10 Ukrainian drones were shot down on their approach to Moscow overnight into Sunday morning, according to the city's mayor.

Trump declined to say what those consequences would be, and went on to add that he had not had discussions about whether to investigate Musk.