President Volodymyr Zelensky said on Sunday that 31,000 Ukrainian soldiers had been killed since Russia’s full-scale invasion two years ago, giving the first official figure for more than a year.

Zelensky told a news conference in Kyiv that he could not disclose the number of wounded because it would help Russian military planning.

“31,000 Ukrainian troops have been killed in this war. Not 300,000, not 150,000 … (Russian President Vladimir) Putin is lying there … But nevertheless, this is a big loss for us.”

Ukraine has not put a number to its military losses since the end of 2022, when presidential aide Mykhailo Podolyak said 13,000 Ukrainian soldiers had been killed since the invasion on Feb. 24.

Russia does not disclose military losses, which it regards as secret.

President Volodymyr Zelensky said on Sunday that it was important for Ukraine to maintain close relations with Poland, but that Kyiv was also ready to defend businesses that have been hurt by border blockades established by Polish protesters.

“It is unfair to use Ukraine for pressure on European institutions… It is important for us to preserve unity, and if no steps are found (for a resolution), we will protect our business,” the Ukrainian leader told a news conference.

President Volodymyr Zelensky warned on Sunday that Ukraine had reached the hardest stage for maintaining unity which was crucial for the war effort against Russia.

“Now is the most difficult moment for our unity, and if we all fall apart, from the outside and God forbid inside, then this will be the weakest moment. It has not happened yet,” the Ukrainian leader told a news conference in Kyiv.

Ukraine has a “clear” plan for a new counteroffensive against Russian forces, President Volodymyr Zelensky said on Sunday, adding that he could not disclose details publicly.

Zelensky told a news conference in the capital Kyiv that troop rotations were critically important for the war effort and that Ukraine needed to better prepare its reserve forces.

Some 160 tons of Ukrainian grain was destroyed at a Polish railway station in an act of “impunity and irresponsibility”, a senior Ukrainian official said on Sunday.

“These pictures show 160 tons of destroyed Ukrainian grain. The grain was in transit to the port of Gdansk and then to other countries,” Deputy Prime Minister Oleksandr Kubrakov posted on X along with photos of mounds of grain spilled out from train wagons.

“The fourth case of vandalism at Polish railway stations. The fourth case of impunity and irresponsibility.”

President Volodymyr Zelensky said on Sunday that 31,000 Ukrainian soldiers had been killed since Russia’s full-scale invasion two years ago, giving the first official figure for more than a year.

Zelensky told a news conference in Kyiv that he could not disclose the number of wounded because it would help Russian military planning.

“31,000 Ukrainian troops have been killed in this war. Not 300,000, not 150,000 … (Russian President Vladimir) Putin is lying there … But nevertheless, this is a big loss for us.”

Ukraine has not put a number to its military losses since the end of 2022, when presidential aide Mykhailo Podolyak said 13,000 Ukrainian soldiers had been killed since the invasion on Feb. 24.

Russia does not disclose military losses, which it regards as secret.

Ukrainian authorities uncovered 47 Russian spy networks operating inside the country last year, a senior security official said on Sunday.

Vasyl Maliuk, head of the Security Service of Ukraine, made the remark during a televised conference in Kyiv, adding that more than 2,000 suspected “traitors” have been arrested since Moscow’s full-scale invasion began.

President Volodymyr Zelensky said on Sunday he was certain that the U.S. Congress would approve a major new batch of military and financial assistance and that Ukraine needed that decision to be made within a month.

“There is hope regarding Congress, and I am sure that it will be positive… They know that we need support within a month,” the Ukrainian leader told reporters at a news conference in Kyiv.

Ukraine needs U.S. Congress to approve aid within a month, Zelensky.

He said: “Theirs is true valour, in the face of indescribable aggression.”

Charles added he is “greatly encouraged” by the efforts of the UK and its allies in supporting Ukraine “at this time of such great suffering and need”.