Ukrainians report fierce fighting as Russia marks Soviet WW2 victory

“We will continue to fight as long as we are alive to repel the Russian occupiers," Captain Sviatoslav Palamar said

Russian President Vladimir Putin told his armed forces on Monday they were fighting for their country at a parade of Russian firepower in Moscow, while his troops stepped up their 10-week-old assault on Ukraine, Qazet.az reports.

Ukrainian officials said heavy fighting was underway in eastern Ukraine and warned people to take cover from expected missile strikes as Moscow marked the 77th anniversary of the Soviet Union's victory over Nazi Germany in World War Two.

Four high-precision Onyx missiles fired from the Russian-controlled Crimea peninsula struck the Odesa area in southern Ukraine, the Ukrainian military said later, without giving details.

Putin said Russia's "special military operation" was a purely defensive and unavoidable measure against plans for a NATO-backed invasion of lands he said were historically Russia's, including Crimea.

"Russia preventively rebuffed the aggressor," he said, offering no evidence for what he called open preparations to attack Crimea and Ukraine's Donbas region.

In 2014, Russian-backed separatists seized parts of Donbas in eastern Ukraine and Russia annexed Crimea from Ukraine the same year. Moscow then massed troops around Ukraine last year ahead of an all-out invasion that Ukraine and its Western allies say was entirely unprovoked.

"NATO countries were not going to attack Russia. Ukraine did not plan to attack Crimea," Ukrainian senior presidential adviser Mykhailo Podolyak said after Putin's comments.

Putin did not mention Ukraine by name in his speech and offered no indication of how long the war might continue.

There was also no reference to the bloody battle for Mariupol, where one of the Ukrainian defenders holed up in the ruins of the Azovstal steel works pleaded with the international community to help evacuate wounded soldiers.