President Volodymyr Zelenskyy said although Ukrainians are doing everything they can to drive out the Russians, "no one today can predict how long this war will last."
"This will depend, unfortunately, not only on our people, who are already giving their maximum," he said in his nightly video address to the nation. "This will depend on our partners, on European countries, on the entire free world."
He said he was thankful to all those who are working to strengthen the sanctions on Russia and increase military and financial support to Ukraine. "This is the only recipe for protecting freedom in the face of the Russian invasion. And for Western countries, this is not simply an expense. This is not about accounting, it's about the future."
Zelenskyy said Ukraine on Friday shot down the 200th Russian aircraft of the war and he noted Russia's heavy losses in tanks, armored vehicles, helicopters and drones.
"And for what? So that the Lenin statue can stand for a bit longer in temporarily occupied Genichesk? There is and can be no other result for Russia."
Russian forces in April restored the Lenin statue in Genichesk, a town in the southern Kherson region.
Zelenskyy said Ukraine was engaged in "very difficult negotiations" to try to evacuate the wounded fighters trapped in the Mariupol steelworks. "We're talking about a large number of people. Of course, we are doing everything to evacuate all of the rest, each of our defenders. We have already brought in everyone in the world who can be the most influential mediators."
Zelenskyy said Ukrainian forces have retaken towns and villages from Russian troops. He said work was underway to restore electricity, running water, telephone communications and social services.
With Ukraine pleading for more arms to fend off the invasion, the European Union's foreign affairs chief announced plans to give Kyiv an additional 500 million euros ($520 million) to buy heavy weapons.
Ukrainian Defense Minister Oleksii Reznikov welcomed the heavy weapons making their way to the front lines but he also admitted there is no quick end to the war in sight.
"We are entering a new, long-term phase of the war," he wrote in a Facebook post. "Extremely difficult weeks await us. How many there will be? No one can say for sure."
