The Ukrainian Navy reported that one of its unmanned surface vessels destroyed a Russian unmanned boat with machine-gun fire in the Black Sea, describing the encounter as the first sea battle in history between unmanned boats [6][25][26]. The Navy said that in a joint operation with military intelligence, its Sargan 3000 drone — equipped with a 12.7-mm remote weapon station — sank the Russian vessel after it was detected by reconnaissance units [25][26]. Der Spiegel reported the Ukrainian account that the Russian drone was sunk with an oversize machine gun, calling it "die erste Seeschlacht in der Geschichte zwischen unbemannten Booten" (the first sea battle in history between unmanned boats) [6]. The War Zone noted the Russian drone did not appear to be armed [25].

Russian strikes across ten Ukrainian regions killed at least nine people and injured dozens overnight, according to Ukrainian and international outlets, though casualty tallies varied across reports [2][4][5][13]. The Kyiv Independent reported 11 killed and 96 injured, with a mass overnight attack on Odesa Oblast injuring at least 35 people including a five-month-old infant [10]. Ukraine's Air Force said Russia launched 129 attack drones plus Kalibr, Kh-59/69 and Iskander-M/KN-23 missiles, of which 110 targets were shot down [10]. Odesa Region Governor Oleh Kiper said a multi-story residential building was damaged [10][36]. In Kramatorsk, the city council said Russian forces attacked private cars in three incidents over 90 minutes, killing three people, stating: "These are not military targets... They are ordinary civilian cars" [4]. Zhytomyr Region Governor Vitaliy Bunechko reported a strike on a grocery store killed two people in Zvyahel [4][11][13]. Ukrnafta CEO Bohdan Kukura condemned strikes on the company's petrol stations, saying: "There is no military objective behind such strikes. This is terror of the civilian population" [9][15]. Amnesty International Secretary General Agnès Callamard said in a February 2026 report on Russia's energy-infrastructure campaign that Russia "is subjecting the entire civilian population to a campaign of extreme cruelty" [28]. President Zelensky said Russia launched nearly 500 strike drones and had "expanded this war from the front lines, where they cannot achieve success, into the economic sphere" [17][23].

The Russian Defence Ministry said its forces struck port infrastructure at Chornomorsk used for military supplies, two dry-cargo vessels and a tugboat, and hit a cargo ship in Odesa it said was carrying military goods [2][4][11][17]. The ministry said its forces also hit Zaporizhstal, an Interpipe Steel complex in Dnipro and several plants in Kryvyi Rih [4][11]. Metinvest Chief Operating Officer Oleksandr Myronenko said four ballistic missiles struck Zaporizhstal, causing critical damage for the third time in a month, and that the plant "did not manufacture products for military purposes" [19]. ArcelorMittal said its Kryvyi Rih plant is "a civilian mining and metallurgical facility" and condemned the attacks [13][19]. The Russian Defence Ministry said its forces downed 230 Ukrainian drones overnight [2][8][31].

Ukrainian forces conducted strikes inside Russia, with the military saying it hit the Tolyattikauchuk synthetic rubber plant in Samara region, asserting the plant produced materials used in Russian missile fuel [4][5][11]. The Security Service of Ukraine said its Alpha Special Operations Center struck an FPV drone production facility, two UAV warehouses, a Pantsir-S2 system and a P-18 Terek radar near Taganrog, calling the operation "a direct response to Russia's massive attacks" [14]. Ukrainian forces also struck an oil refinery in Saratov and Ozon's logistics hub in the city [9][15]. Russian regional officials reported civilian harm: Belgorod Governor Alexandr Shuváev said one person was killed and 14 injured including four minors [8]; Tula Region Governor Dmitry Milyayev said two were killed and three injured [9][15]; Taganrog Mayor Svetlana Kambulova said four commercial properties were set ablaze [2][4]; and Togliatti Mayor Ilya Sukhikh said several residential buildings were damaged and one person injured [4][5][11].

On the diplomatic track, Zelensky said he is willing to meet Putin at the December G20 summit in Miami [1][5][32]. US President Donald Trump said Putin wants to reach a deal and suggested a trilateral meeting could take place [3]. US envoys Steve Witkoff and Jared Kushner visited Moscow and Kyiv last week for talks [3]. Kremlin spokesperson Dmitry Peskov said Moscow has not decided whether Putin will attend the G20, telling DW: "We don't know yet whether we'll be going to Miami" [5], and reiterated that Zelensky should come to Moscow [1][18]. Kremlin foreign policy aide Yuri Ushakov said the possibility of Putin attending the G20 "has not even been discussed" [2][32]. Russian Foreign Minister Sergey Lavrov said Russia is ready for negotiations but the military operation "will not be suspended during this period of negotiations" [18]. Peskov told Izvestia that Russia remains open to trilateral talks with the United States and Ukraine and hopes the parties can gather again "in the foreseeable future" [3].

Western and regional officials assessed that Russia is probing NATO defenses through undersea operations, drone incursions and border provocations. Reuters reported that Britain, Norway and the United States tracked and confronted Russian GUGI submersibles simulating deployment of technology to disable undersea cables near Svalbard [27]. Norwegian Defence Minister Tore Sandvik said the joint operation "sent a clear message to Russia that they cannot operate covertly" [7][27]. DW reported that Russian drone incursions have become almost daily in Moldova and Romania, with a Geran drone overflying Romania before crashing in Moldova [21]. Moldovan President Maia Sandu said: "It is hard to understand, given this reality, that there are still voices who try to convince Moldovans that Russia is not the aggressor" [21]. A September 8 strike on the Starokazache border crossing killed two civilians [21][29]. Putin warned that European troop deployments into Ukraine would mean "a war with Russia" [18].

EU officials warned that Russian strikes on grain vessels and port infrastructure are driving a global food-security shock. EU High Representative Kaja Kallas said the strikes "could provoke a new global shock in terms of food security" [35]. The FAO food price index reached 133.3 points in August 2026, its highest since late 2022 [34]. Ukrainian Foreign Minister Andri Sibiga urged the US Congress to pass a Senate-approved sanctions bill with 500% tariffs on Russian imports, saying Moscow "is intensifying its campaign of terror against Ukraine" [17]. Trump expressed support for the sanctions bill [17].

The diplomatic track and the military campaign are proceeding in parallel, with Lavrov stating the military operation will continue regardless of negotiations [18], and Ukrainian and Russian forces conducting strikes on each other's territory as US envoys shuttle between capitals [3][9][14].