Fibre optic drones: The terrifying new weapon changing the war in Ukraine

The BBC reports from Donetsk where swarms of fibre optic drones give Russia the edge as Ukraine defends towns behind the front line.

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A 250kg glide bomb has ripped through the town's main administrative building, and taken down three residential blocks. We're visiting a day after the bomb struck, but parts of the wreckage are still smoking. From the edges of the town we hear the sound of artillery fire, and of gunshots – Ukrainian soldiers shooting down drones.

Rodynske is about 15km (9 miles) north of the embattled city of Pokrovsk. Russia has been trying to capture it from the south since the autumn of last year, but Ukrainian forces have so far managed to stop Russian soldiers from marching in.

So Russia has changed tactics, moving instead to encircle the city, cutting off supply routes.

In the past two weeks, as hectic diplomatic efforts to bring about a ceasefire in Ukraine have failed, Russia has intensified its push, making its most significant advances since January.