Key developments on Oct. 27: Zelensky: Russia has lost at least a brigade trying to capture Avdiivka Germany delivers IRIS-T air defense system, other aid to Ukraine Russian pilot sentenced in absentia to 14 years in prison for killing civilian Ukraine retrieves 50 bodies of fallen soldiers Wanted pro-Russian politician reportedly shot in Crimea Russia claims drone attack on Kursk Nuclear Power Plant Russia has lost at least a brigade of troops trying to capture Avdiivka in Donetsk Oblast during its latest offensive, President Volodymyr Zelensky said on Oct. 27. A brigade in the Russian army can include between 2,000 and 8,000 personnel, according to open sources.