Moscow has accused a British diplomat of "spying". Meanwhile, Russian forces are advancing in Ukraine at the fastest rate since the early months of the war, according to a respected US-based thinktank.

Ukraine's air force reported that Russia is shifting its drone strategies, launching 145 Shahed drones in recent attacks against Ukrainian targets. In a midday strike, a Russian ballistic missile hit the southern Ukrainian city of Odesa, wounding 10 people as it detonated in the downtown area, according to local officials.