Ukraine fired almost 1,200 drones at Russian targets overnight in one of its biggest aerial attacks since Moscow's full-scale invasion nearly five years ago, the Associated Press reported.

Russia's Defence Ministry said air defences downed 1,198 Ukrainian long-range drones between late Thursday and early Friday. However, strikes on three Russian regions killed seven people, including a 12-year-old, and wounded 17, local officials said. Kyiv has not confirmed how many drones it launched.

Ukraine's General Staff said it hit an oil refinery in the Russian city of Volgograd, starting a fire. The refinery has a capacity of about 110 million barrels per year, it said. The massive drone barrage appeared designed to show that Kyiv is holding its own in the war, countering Moscow's insistence that a Russian victory is inevitable. Ukraine has repeatedly hit Russian refineries, claiming last month it neutralized more than half of Russia's refining capacity.

Russia launched 117 drones against Ukraine overnight, killing at least two people, including a 17-year-old, authorities said. A single Russian attack on Friday on southern Zaporizhzhia hit two five-storey apartment blocks and wounded 30 people, including six children, officials said. Russian attacks on Ukraine's energy infrastructure caused widespread power outages across about half of the country's regions on Friday, said First Deputy Minister of Energy Artem Nekrasov. Moscow has battered Ukraine's power grid each winter since the war began, hoping to weaken public morale.

Meanwhile, US and Russian negotiators raised the stakes in talks to stop the fighting by including for discussion wider European security arrangements that have been in place since the end of the Cold War. That change, long sought by Moscow, has alarmed European leaders and placed a question mark on NATO's future role. After two days of talks with Russian and Ukrainian delegations in Abu Dhabi this week, US envoys went in person to brief Russian President Vladimir Putin in the Kremlin and Ukrainian President Volodymyr Zelenskyy, who was meeting with European leaders in Dublin.

Kushner said Russia has agreed to include Europe in upcoming talks, after Moscow's long insistence that the continent's governments should be excluded because they supported Ukraine. Europe's presence at the negotiating table will allow negotiators "to address the broader postwar European security arrangements alongside the territorial issues between Ukraine and Russia," Kushner said. More talks are planned as negotiators seek a breakthrough in peace efforts, according to US envoys Steve Witkoff and Kushner.

European leaders were wary of Russian maneuvering. German Chancellor Friedrich Merz said: "Russia wants to talk about questions of European security architecture. We don't need to talk about that. There is one," referring to the NATO military alliance. The EU's top diplomat, Kaja Kallas, said Europe must insist on a ceasefire before taking the negotiations further — the opposite of what Putin demands. "If we start to talk about what Russia is asking regarding the security architecture, we actually walk into the traps that Russia is setting us," she said in Dublin. Luxembourg Prime Minister Luc Frieden insisted that Europe must take its fate into its own hands. "We cannot let neither the Americans nor the Russians decide about our future," Frieden said. Moscow is aiming "to dismantle NATO and the post-Cold War European security architecture," the Institute for the Study of War said in an assessment on Thursday. Kremlin spokesman Dmitry Peskov reaffirmed that Russia is open for contacts with the Europeans.

Zelenskyy on Friday repeated his complaints about drone speed limits on the US Starshield system — SpaceX's military-grade version of the Starlink satellite internet service — that Ukraine needs for its defence. The speed restrictions are limiting Ukrainian drones to 161 kph (100 mph) on the entire front line and in Russian-occupied territory, he said, making it impossible for Kyiv to deploy its interceptors effectively against Moscow's fast-moving jet-powered drones. "We still have no clear explanations," he said of the unannounced restrictions, after first raising the issue on Thursday. Ukrainian officials are asking the US State Department, the Pentagon and SpaceX to clarify and resolve the situation. Elon Musk acknowledged in October that his company SpaceX had throttled the Starlink internet service in Ukraine for about a week, saying the system couldn't be used for offensive strikes against Russia.

Kyiv's forces are using drones and ground robots to help defend against Russia's army along the about 1,200-kilometre (750-mile) front line snaking down eastern and southeastern Ukraine. The war has killed hundreds of thousands of soldiers and thousands of civilians, analysts and humanitarian organizations say.