Ukraine and Russia have continued striking each other overnight, with Volodymyr Zelensky accusing Moscow of using North Korean missiles. The Ukrainian president said strikes in Zaporizhzhia - which killed at least six and injured at least 19 - involved ballistic missiles from Russia's ally. In Voronezh, in southern Russia, warehouses belonging to the online retailer, Wildberries, were hit by Ukraine. The company, known as Russia's Amazon, has been repeatedly targeted in recent weeks. The attacks come a day after at least 13 people were killed, including one child, in Ukrainian drone strikes on the Russian republic of Tatarstan, more than 1,100 km (680 miles) from the Ukrainian border.

Is the war entering a new phase? At least 13 killed in Ukrainian drone attack on Russia's Nizhnekamsk At least 13 people, including a child, have been killed in a Ukrainian drone attack on the Russian city of Nizhnekamsk, authorities said, as Ukraine's military said it carried out an attack on an oil facility in the region. Monday's attack in the Tatarstan region, about 800km (497 miles) east of Moscow, wounded at least 39 others, regional authorities said. The Russian defence ministry says it intercepted more than 450 Ukrainian drones overnight, as both sides continue to exchange heavy attacks. Nizhnekamsk plays a crucial role in Russia's oil exports, hosting one of the country's largest and most advanced refineries.

At least 13 killed in Ukrainian strike on Russia's Tatarstan region, officials say At least 13 people have been killed in a Ukrainian drone strike on the Russian republic of Tatarstan, officials have said. One child was among the victims with 75 more people injured, Russian authorities said, in one of the deadliest single attacks on Russia since the start of Moscow's full-scale war in Ukraine. Kyiv has not yet commented on the strike on the city of Nizhnekamsk, which is more than 1,100 kilometres (680m) from the Ukrainian border. Ukraine's Armed Forces confirmed Nizhnekamsk's Tanevo oil refinery had been hit, while Ukrainian defence technology manufacturer FirePoint said its FP-1 drones had been used in the attack. The strike lasted several hours overnight and into the morning, local sources say.

Drone manufacturers in the Russia-Ukraine war face a growing threat as executives and engineers are targeted in car bombings, shootings, and espionage plots.

German airport drone-bomb: Could Russia be involved? As Germany investigates how a drone loaded with explosives reached a runway at Leipzig airport, there is renewed talk in Europe of hybrid war. The interior minister is warning of a new level of danger from an attack that may involve foreign powers. There is no proof at this stage to link the flying bomb directly to Russia, which denies any role. But as well as the means and the motive, Moscow does have form.

Ukraine said it has hit two oil refineries in multiple strikes deep inside Russia with patrol boats and other vessels in the Black Sea also hit. President Volodymyr Zelensky said the Bashneft-Novoil and Slavneft-Yanos refineries were struck in the attacks aimed at limiting oil revenues Moscow uses to finance its war. Yaroslavl regional governor Mikhail Evraev said Slavneft-Yanos was on fire after what he called the largest enemy drone attack. He said four people were injured. Meanwhile, Ukraine said at least 11 people were killed in Russian attacks, and the southern city of Kherson reported a total blackout.

Is the war entering a new phase? Russian forces have killed at least six people in Ukraine, according to officials, after launching ballistic missile attacks on the capital, Kyiv, and strikes on other regions, including a supermarket in the northern city of Chernihiv. The attacks on Sunday came as Russian officials said that Moscow-occupied areas of Ukraine had also come under fire, with four people killed in a Ukrainian drone strike on the occupied city of Horlivka. Kyiv, Chernihiv, Zaporizhzhia and Kharkiv cities were all hit. In northern Chernihiv, officials said a Russian drone hit a supermarket, killing two people, including a nine-year-old girl, and wounding 25 others.

The Ukrainian capital Kyiv came under ballistic missile attack from Russian forces early on Sunday, local authorities said, while other regions suffered bombardments later during the day that killed at least six people. Russia said areas of Ukraine under Moscow's control had also come under attack, with four people killed in a Ukrainian drone strike in the Russian-occupied Ukrainian city of Horlivka. In its morning note, Ukraine's air force said Russia had launched seven ballistic missiles and 136 drones at Ukraine overnight. In the northern Ukrainian city of Chernihiv, a Russian drone hit a supermarket, killing two people -- including a 9-year-old child -- and wounding 25, Ukraine's emergency services said. "This is deliberate Russian terror that has no military justification," President Volodymyr Zelenskyy wrote on Telegram. In the eastern city of Kharkiv, one person was killed and 16 others required medical attention after a daytime drone attack, Mayor Ihor Terekhov said on Telegram.

In "Biological War," Annie Jacobsen imagines society collapsing from a man-made plague--part of a wave of such prophecies. But what do we miss when we try to predict the future? In the fall of 1989, a select group of Soviet scientists was summoned to Obolensk, a secluded municipality on Moscow's periphery, and gathered at what appeared to be an insane asylum to discuss a pioneering technique for mass murder. If someone had been observing the institutional activity from space--a distinctly non-theoretical possibility--they might have seen a shuffle of patients roaming the grounds or playing volleyball in their pajamas. These were actors, hired to play the disturbed as a cover story for something even more disturbing. The eight-story glass building at the center of the complex, which had putatively been devoted to vaccine manufacturing, was in fact a highly classified defense facility. Its remit was called, or "biological preparations"--what one participant later described as "the most ambitious Soviet arms program since the development of the hydrogen bomb." The most recent experiments there had at last demonstrated the viability of a weapon that could wipe out entire enemy populations without leaving a scratch on their infrastructure. It was a pathogen genetically engineered to spread within hours, to kill within days, and to resist all existing treatment.

Is the war entering a new phase? At least 11 people have been killed in Russian attacks on Ukraine, while Ukrainian attacks on Russia's Kirov region killed six others, officials on both sides of the conflict said. A Russian missile attack killed six people and wounded "dozens" in the Kyiv region on Friday, Ukrainian President Volodymyr Zelenskyy said. Earlier, Kyiv mayor Vitali Klitschko reported explosions in the city and called on residents to stay in shelters as air defence systems were operating. Separately, Vadym Filashkin, the governor of the city of Sloviansk, said five people were killed and nine others injured after Moscow dropped two aviation bombs on the city.