State Emergency Service Of Ukrai/via Reuters

LONDON -- Ukrainian President Volodymyr Zelenskyy on Sunday urged "collective pressure on Russia" amid the latest American peace push in Ukraine, and as Moscow and Kyiv both continued their long-range barrages despite renewed diplomatic maneuvers.

"We are starting a new diplomatic week," Zelenskyy said in posts to social media, saying Ukrainian representatives would be meeting with European counterparts in the coming days. Zelenskyy himself will travel to the U.K. on Monday.

Zelenskyy said the most pressing questions included "security issues, support for our resilience and support packages for our defense." For the latter, "air defense and long-term funding for Ukraine" are Kyiv's prime concerns, the president said.

Zelenskyy said the Ukrainian negotiating team held "substantive discussions" with U.S. envoys in recent days, with Kyiv's delegation -- led by National Security and Defense Council Secretary Rustem Umerov and Chief of the General Staff Andrii Hnatov -- now returning to Europe.  

"I expect detailed information from them on everything that was said to the American envoys in Moscow, and on the nuances the Americans are prepared to modify in negotiations with us and with the Russians," Zelenskyy said.

"Ukraine deserves a dignified peace, and whether there will be peace depends entirely on Russia -- on our collective pressure on Russia and on the sound negotiating positions of the United States, Europe, and all our other partners," the president wrote.

"Russia must be held accountable for what it is doing -- for the daily strikes, for the constant terror against our people, and for the war itself," Zelenskyy said.

Long-range Russian drone and missile strikes continued all across Ukraine through the weekend, with Ukrainian officials reporting that the attacks focused on critical energy infrastructure.

On Monday morning, Ukraine's air force said Russia launched 149 drones into the country overnight, of which 131 were shot down or suppressed.

Ukraine's Energy Ministry said in a post to Telegram that the continued Russian strikes had caused significant power outages for customers in Dnipropetrovsk, Donetsk, Zaporizhzhia, Sumy and Chernihiv regions.

Ukraine also continued its own cross-border strike campaign. Russia's Defense Ministry said on Monday that its forces downed at least 67 Ukrainian drones overnight, including two over the Moscow region.