“To achieve the desired effects, pressure on Russia must be maintained continuously,” Tusk said. He added that all summit participants expressed readiness to increase pressure on Russia if needed.
Countries taking part in the Paris meeting outlined security guarantees that would take effect following a potential ceasefire in Ukraine. A declaration adopted after the summit referred to a ceasefire monitoring mechanism to operate under US leadership, Polish state news agency PAP reported.
French President Emmanuel Macron said future security guarantees would be key to bringing an end to Russia's war in Ukraine.
Following the meeting, Macron, Ukrainian President Volodymyr Zelensky and British Prime Minister Keir Starmer signed a separate trilateral memorandum on the deployment of multinational forces after a ceasefire, the PAP news agency said.
Starmer said the document paves the way for a legal framework under which British, French and partner forces could operate in Ukraine.
Zelensky said the documents demonstrated how seriously the coalition was prepared to cooperate on security and added that work on the arrangements would continue. He also said that coalition guarantees should complement, not replace, separate US security commitments.
Macron also announced plans to establish a coordination unit to facilitate cooperation among the coalition, the United States and Ukraine.
Although the United States is not formally part of the coalition, a US delegation attended the summit.
Steve Witkoff, a special envoy of President Donald Trump, said that Trump "strongly stands behind security protocols" for Ukraine.
Speaking at a joint news conference with French, German, British and Ukrainian leaders, Witkoff said: "Those security protocols are meant to ... deter any attacks, any further attacks in Ukraine, and ... if there are any attacks, they're meant to defend, and they will do both. They are as strong as anyone has ever seen."
Witkoff also said that talks were close to concluding a separate "prosperity agreement for Ukraine, Polish state news agency PAP reported.
It said the summit brought together representatives from 35 countries, including heads of state and government from 27 nations.
Poland's Tusk cautioned against excessive optimism, saying peace ultimately depends on Russia’s decision to end the war.
However, he said coordinated pressure among the United States, the European Union and coalition partners such as Canada, Turkey and Norway was bringing tangible progress.
“We are getting closer each week to concrete solutions,” he said, adding that details of joint commitments should be finalized by the end of January.
Tusk said Poland is ready to take on key logistics responsibilities but stressed that Polish troops would not be deployed to Ukraine.
He said there was no expectation from partners that Poland would send forces under any scenario.
“Poland will be a leading country in logistical and organizational matters,” he said.
Tusk also said he plans to meet later this week with Polish President Karol Nawrocki to coordinate their roles in the security process. He said he would urge the president to use his relations with the US administration to strengthen coordination.
"On security issues, we cannot afford even the smallest margin of error," Tusk said, expressing confidence that domestic political differences would not undermine Poland’s position.
He added that he was encouraged by remarks from US officials praising Poland as a model for postwar recovery and reform, saying Ukraine could follow a similar path.
"Ukraine has a chance to go the Polish way," Tusk said.