Ukraine claimed three more Russian Su-34 bombers downed on Friday, all in the southern area of operations which has been the focus of Kyiv's counteroffensive efforts over the past six months. -snip- Unconfirmed reports on the pro-war Russian Military Informant Telegram channel attributed Friday's three destroyed Su-34 aircraft to a U.S.-made MIM-104 Patriot air defense system, the first of which arrived in Ukraine in April.