Russian defence ministry said Ukraine continued artillery fire on population centres and Russian army positions while Kiev accused Moscow of striking the city of Kramatorsk.
The nationwide alert may have been declared in Ukraine after Russian jets stationed in Belarus took off, as the conflict enters its 307th day.
Russia warns if US delivers sophisticated missiles to Ukraine it would be "another provocative move" that could prompt a swift response from Moscow, as fighting enters its 295th day.
Ukranian President Volodymyr Zelenskyy says the situation “remains very difficult” in several frontline cities in eastern Ukraine's Donetsk and Luhansk provinces.
Russian President Putin acknowledges that his army could be fighting in Ukraine for a long time, but for now there will be no second call-up of soldiers, as conflict enters its 287th day.
Ukraine appears to expose Russian air defence gaps with long-range strikes as fighting enters its 286th day and attention turns to use of drones in the conflict between the European neighbours.
Fierce fighting between forces of Moscow and Kiev continues in the eastern Donetsk region while Ukraine reports Russian shelling in southern areas, as the conflict rolls into its 281st day.
Russia continues to strike eastern and southern Ukraine while civilians continue to leave Kherson region as the conflict enters its 278th day.
Russia orders its troops to withdraw from the west bank of the Dnipro River near the strategic southern Ukrainian city of Kherson, a potential turning point in conflict – now in its 260th day.
Iran has acknowledged for the first time that it supplied Russia with drones, insisting the transfer came before the war in Ukraine that enters its 255th day.
Moscow suspends its implementation of Black Sea grain deal that has brought down soaring global food prices amid fighting - now in its 249th day – with Ukraine accusing Moscow of creating a world "hunger games".
Russia says reservists have been called up, with Moscow fighting to turn the tide after defeats in Ukraine have left the key southern city of Kherson in Kiev's sights, as the conflict continues onto its 247th day.
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