Russia-Ukraine war live updates: Southern Ukraine city hit by 'strongest' Russian strikes

Authorities in Ukraine's southern city of Mykolaiv said Sunday that widespread Russian bombardments overnight had left at least one person dead, as Moscow continued to pummel the sprawling front line."Mykolaiv was subjected to mass shelling today. Probably the strongest so far," the city's mayor Oleksandr Senkevych wrote on Telegram."Powerful explosions were heard after one in the morning and around five in the morning."The governor of the region -- where Ukrainian forces are looking to launch a major counter-offensive -- said that according to preliminary information one person had been killed and two wounded in the strikes.

Ukraine on Sunday denied carrying out a drone attack on the headquarters of the Russian Black Sea fleet in annexed Crimea, that Russian officials said wounded six personnel.Sergiy Bratchuk, spokesman for the coastal Odessa military region, dismissed claims that Ukraine was behind the attack as "sheer provocation"."Our liberation of Crimea from the occupiers will be carried out in another way and much more effectively," he wrote on Telegram.

A drone-borne explosive device detonated on Sunday at the headquarters of Russia's Black Sea Fleet, injuring six people, officials said.The explosion at the headquarters in the city of Sevastopol on the Crimean peninsula that Russia annexed from Ukraine in 2014 caused cancellation of observances of Russia's Navy Day holiday.The Black Sea Fleet's press service said the drone appeared to be homemade. It described the explosive device as “low-power” but Sevastopol mayor Mikhail Razvozhaev said six people were injured in the blast.

Ukraine's president said on Sunday that the country's harvest could be half its usual amount this year due to the Russian invasion of Ukraine."Ukrainian harvest this year is under the threat to be twice less," suggesting half as much as usual, President Volodymyr Zelenskiy wrote in English on Twitter.

Ukrainian President Volodymyr Zelensky has asked civilians remaining in parts of eastern Donetsk, which is still under Kiev's control, to evacuate as Russia has intensified fighting in the region.In his nightly video address to the nation on Saturday, the President said: "There are hundreds of thousands of people, tens of thousands of children... Many people refuse to leave... But it really needs to be done. This decision will have to be made... And the sooner it is done, the more people leave Donetsk region, the fewer people the Russian army will be able to kill.

Ukraine's president urged civilians on Saturday to evacuate the frontline Donetsk region, the scene of fierce clashes with the Russian military, as Kyiv called on the Red Cross and UN to gain access to its soldiers being held by Moscow's forces.