Ukrainian forces have carried out a missile attack deep inside Russia, hitting a major military plant overnight, President Volodymyr Zelensky has said. He said FP-5 Flamingo cruise missiles struck the drone and missile plant in the city of Cheboksary, in the Chuvash Republic, more than 900km (560 miles) from the front line. Local officials said three people were injured in a missile attack on the city. Ukraine also said it had hit the Moscow-occupied port of Mariupol on the Sea of Azov, a Russian oil refinery in Samara and a shadow fleet oil tanker in the Black Sea. In recent months, Ukraine's military has intensified its drone strikes on key facilities across Russia.

Recent incidents heighten anxieties that hybrid warfare tactics could trigger military confrontation with Russia. Lithuanian armed special forces and members of the Lithuanian Riflemen's Union take part in a military exercise in central Lithuania [File: Nils Adler/Al Jazeera] A member of the Lithuanian Riflemen's Union joins in military exercises in central Lithuania [File: Nils Adler/Al Jazeera] Along the forests and marshlands that separate the Baltic states from Russia and Belarus, workers are digging anti-tank ditches, pouring concrete bunkers and erecting rows of dragon's teeth - jagged concrete obstacles designed to slow and channel advancing armour - to buy precious time in the event of an attack. Russia's full-scale invasion of Ukraine in 2022 reignited old fears in Estonia, Latvia and Lithuania, where memories of Soviet rule remain close to the surface. In the years since, those fears have been channelled into preparation. Defence budgets have surged, military exercises have intensified, and new fortifications have emerged even as daily life largely continues as normal.

Ukrainian drones have struck energy and industrial targets across several Russian regions, Russian authorities say, in an escalating campaign of strikes against infrastructure. In Saratov, a region on the Volga River with several oil refineries that has come under regular Ukrainian attack in recent years, Governor Roman Busargin said on Sunday on Telegram that "civil infrastructure" had been damaged in the overnight strikes. In the Kirov region, northeast of Moscow and about 1,300km (800 miles) from Ukraine, Governor Alexander Sokolov said drones had hit a facility in the Urzhumsky district. The Ukrainian army confirmed the attack, saying it had also hit the Lazarevo oil-pumping station in the region. Governors in the Rostov, Voronezh and Belgorod regions, all of which border Ukraine, also reported strikes, and three civilians were injured in Belgorod.

Rescuers work at the site of an apartment building hit by a Russian drone strike in Zaporizhzhia, Ukraine, on Saturday. Ukraine and Russia traded aerial attacks on Saturday as President Volodymyr Zelenskyy held what he called a special meeting on next steps with top aides. A Ukrainian drone struck the machine room building of one of power units at the Russian-occupied Zaporizhzhia nuclear power plant in southeastern Ukraine on Saturday afternoon, causing unspecified damage, Interfax reported, citing Rosatom Chief Executive Officer Alexey Likhachev. Core equipment wasn't damaged, he said. Ukraine's southern military command denied any strikes, saying its military personnel "act exclusively within the framework of international humanitarian law and are aware of the consequences of any actions against nuclear facilities." In a post on Facebook late Saturday, it added, "It is the Russian Federation that has illegally kept the Zaporizhzhia Nuclear Power Plant under military control since March 2022, turning a civilian nuclear facility into an element of military infrastructure."

Ukraine has launched coordinated drone attacks on Russian energy infrastructure across multiple regions overnight. The most significant strike hit Taganrog, Rostov Oblast, where a major port fire broke out after drones hit a tanker, fuel tank and administrative building, Russia's RIA Novosti state media agency reported. "A tanker, a fuel tank, and an administrative building caught fire at the port of Taganrog as a result of a drone attack," Slyusar wrote. "According to preliminary information, there are no casualties. The information is being clarified."

Romania and its NATO allies have reacted angrily after a Russian drone crashed into an apartment building in eastern Romania, injuring two people. The Ministry of Foreign Affairs in Bucharest on Friday labelled the crash of the drone, part of an overnight attack aimed at Ukraine, a serious violation of international law. The incident is just the latest incursion along the alliance's eastern flank, raising concern that the risk of an open confrontation between Russia and NATO states is rising. Romania said the overnight drone was tracked by radar in its airspace before crashing onto the roof of a residential building in the city of Galati. Two F-16 fighter jets and a helicopter were scrambled, as authorities issued emergency alerts to residents.

Russian lawmakers have passed a bill to allow trained bank employees to shoot down Ukrainian drones amid an increase in the number of attacks. The draft legislation, which would see banks across Russia install electronic jamming systems while selected employees would shoot down incoming unmanned aircraft, passed in its third and final reading in the lower house Duma on Tuesday, according to the state-run TASS news agency. The bill says the legislation is needed to protect Bank of Russia facilities, including those located in the new constituent entities of the Russian Federation - referring to the four eastern Ukrainian regions that Moscow has announced it has annexed despite not controlling them fully - amid the increasing number of sabotage and terrorist attacks. Under the plan, banks would finance the installation of the equipment on their premises. With banks in almost every town, their incorporation into Russia's air defences could help expand its cover.

Belgium and France have summoned Russia's ambassadors to express anger after Moscow urged foreigners to leave Kyiv in advance of planned "systematic strikes". Brussels and Paris said on Wednesday that Russia's announcement earlier in the week was "unacceptable" and a violation of international law. The spat is unlikely to help smooth the way for the EU to mediate talks to bring the conflict to an end, an arrangement that Russian President Vladimir Putin said on Wednesday he is ready to accept. Germany, the Netherlands, Norway and the European Union summoned Russian envoys on Tuesday following Moscow's warning that foreigners and diplomats should leave the Ukrainian capital before the onset of renewed air strikes . "Threatening embassies is not diplomacy, it is intimidation. And it is a flagrant violation of international law and the Vienna Convention," Belgium Foreign Minister Maxim Prevot said on Wednesday.

Recent weeks have seen a significant escalation of military tensions in and around the Baltics. Lithuania, Latvia and Estonia, which are all NATO members, now experience regular incursions into their airspace by Ukrainian drones. According to both Kyiv and the Baltic capitals, those drones, en route to hit targets in western Russia, get diverted by Russian electronic jamming and end up entering these countries' territories. In early May, several stray unmanned aircraft crashed in Latvia, one of them damaging an oil storage facility. Those developments triggered a political crisis in Latvia and led to the collapse of its government.

VILNIUS/STOCKHOLM/LONDON - Ukrainian drones have strayed into Baltic countries' airspace in recent weeks, sowing confusion and raising tensions with Russia at a time when U.S. commitment to NATO's collective security is in question. The airspace incursions have occurred as Ukraine, seeking to land heavier blows on Russia four years after Moscow's full-scale invasion, uses exploding drones to hit Russian Baltic ports that handle nearly 40% of national oil and gas exports. In most cases, Kyiv and the Baltic states have confirmed the stray drones are Ukrainian but have blamed Russia for causing them to deviate from their flight path with the use of electronic defenses that jam or spoof signals. In a time of both misinformation and too much information, quality journalism is more crucial than ever. By subscribing, you can help us get the story right.