A Ukrainian drone attack launched overnight succeeded in destroying an ammunition depot in the western Russian region of Tver, a source from Ukraine’s Security Service (SBU) told CNN on Wednesday.

A suspected Ukrainian drone attack at an ammunition depot in Russia's Tver region has been described on social media as possibly the biggest event of the war started by Vladimir Putin.

An apparent Ukrainian attack on Russian military infrastructure — one of more than 10 since the beginning of August — struck overnight Tuesday. A munitions depot in the town of Toropets, deep inside Russia,

Ukrainian drones have struck a large military depot in a town deep inside Russia overnight, causing a huge blaze and prompting the evacuation of residents.

Russia said it was working to repel a Ukrainian drone attack on Toropets, where there's a major military depot, as explosions lit up the night.

Ukraine destroys Russian arsenal, Poltava attack kills dozens, Russia nears rail hub. Washington considers authorizing long-range strikes.

Ukrainian drones hit an ammunition depot inside Russia this week, the latest attack targeting military facilities deep within the country.

Ukraine's air force said on Thursday it had shot down all 42 drones and one of four missiles used by Russia during overnight attacks. Air defences went into operation in nine Ukrainian regions, the air force said in a statement on the Telegram messaging app nearly 31 months after Russia's full-scale invasion.