Ukrainian President Volodymyr Zelensky says Ukraine's partners in Europe have not given him concrete pledges that they will defend Ukraine in the case of a new Russian aggression.
"I continue to pose this critical question to every one of our allies and thus far, the answer remains elusive a definitive and straightforward response yet," he stated to the press on midweek.
His comments come a day after the UK and France inked a statement of purpose on deploying troops in Ukraine should a ceasefire agreement to end the war with Russia is finalized.
However, full security guarantees have yet to be solidified. The US, which has been leading efforts to end the invasion, was reported to have abstained from signing such a commitment at discussions held in the French capital on Tuesday.
Following the negotiations in Paris, which included some 30 countries that form the so-called Coalition of the Willing, British PM Keir Starmer said the two nations would "set up operational bases across Ukraine" to deter future invasion, while France's President Macron subsequently indicated a significant number of soldiers may be sent.
Partner nations suggested that the US would take the lead in overseeing any ceasefire. But the key issue of ceding land that Ukraine is being asked to grant to Russia as part of the peace proposals are still being discussed.
Moscow has not yet commented on the declaration made in the city of Paris.
President Putin launched a full-scale invasion of Ukraine in February 2022, and Moscow now occupies about 20% of Ukrainian territory.
Sir Keir described the joint statement as "a vital part of our commitment to stand with Ukraine for the long-term".
He added: "It establishes the pathway for the legal framework under which British, French and partner forces could operate on Ukrainian soil, protecting Ukrainian airspace and waters, and regenerating Ukraine's armed forces for the years to come."
Zelensky hailed that agreement as a "significant leap of progress".
Twenty-four hours afterward, however, he appeared less optimistic.
"I perceive the determination, the political will, and that the partners are ready, and the partners are ready to give us strong sanctions, powerful defense assurances," he said when questioned if nations in Europe would come to Ukraine's aid.
"But as long as we lack such binding security pacts - formally ratified, supported by parliaments, supported by the United States Congress - this crucial issue remains unresolved. And even if they do, you must ultimately depend first and foremost on your inherent capabilities."
The Paris talks were also notable due to the attendance of US President Donald Trump's peace envoys, Jared Kushner and Steve Witkoff.
Witkoff said the allies "largely finished" their work on finalizing security arrangements.
Last week, Zelensky said a peace deal was "ninety percent complete".
Questions of land and security guarantees have been at the forefront of unresolved issues for negotiators.
Putin has repeatedly warned that Ukraine's military must pull back from all of Ukraine's eastern Donbas or Russia will seize it, dismissing potential concessions over how to conclude hostilities.
The Ukrainian President has thus far rejected relinquishing any land, but has proposed that Ukraine could redeploy its forces to an agreed point - but provided that Russia did the same.
Moscow currently controls about 75% of the Donetsk oblast, and some nearly all of the adjacent Luhansk region. The two regions constitute the industrial Donbas region.
It has been intensifying attacks against Ukrainian cities - with a focus on power facilities. Russia has also made slow progress in capturing more Ukrainian territory.
Ukrainian forces have retaliated at objectives inside Russia with unmanned aerial vehicles, though with varying degrees of effectiveness.
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