Urban combat in Kostiantynivka, ZNPP power loss, and refinery strikes reported

Ukrainian forces are engaged in urban combat against infiltrating enemy personnel in Kostiantynivka, with assault units conducting clearing operations. A battalion commander described the city as "semi-encircled" following Russian advances near Chasiv Yar and Berestky. Reports indicate over a hundred Russian personnel have infiltrated, with some observed in the city center. Separately, the Zaporizhzhia Nuclear Power Plant (ZNPP) experienced its 19th loss of external power on June 10, around 9 PM, after an attack on an electrical substation, leading it to rely on backup diesel generators, a situation confirmed by the IAEA. Additionally, Ukrainian Defense Forces reportedly struck the "TANEKO" and "TAIF-NK" oil refineries in Nizhnekamsk, Tatarstan, on June 12, with hits and fires confirmed. Forbes Ukraine also reported a strike on the "Tolyattikauchuk" combine in Samara Oblast. Sources: Громадське, Українська правда, Forbes Ukraine.