Ukrainian President Volodymyr Zelensky says European allies have not given him solid assurances that they will protect his country in the event of a new Russian aggression.
"I continue to pose this critical question to all our partners and I have not received a definitive and straightforward response yet," he stated to the press on Wednesday.
His comments come a day after Britain and France signed a statement of purpose on stationing forces in Ukraine if a peace deal to end the war with Russia is agreed.
However, full security guarantees have yet to be solidified. The US, which has been spearheading initiatives to halt the offensive, reportedly did not sign such a pledge at talks in Paris on the previous day.
After the Paris talks, which involved some 30 countries that comprise the so-called Coalition of the Willing, UK Prime Minister Sir Keir Starmer said the two nations would "establish military hubs across Ukraine" to deter future invasion, while French President Emmanuel Macron later said thousands of troops may be deployed.
Allies proposed that the US would assume a leading role in overseeing any ceasefire. But the key issue of territorial concessions that Ukraine is being pressured to offer to Russia as part of the peace proposals are continuing to be negotiated.
The Russian government has not yet commented on the declaration made in the city of Paris.
President Putin launched a comprehensive military assault of Ukraine in February 2022, and Russian forces currently controls about 20% of Ukrainian territory.
The UK Prime Minister characterized the bilateral declaration as "a vital part of our dedication to support Ukraine for the foreseeable future".
He added: "It paves the way for the legal framework under which British, French and partner forces could function on Ukrainian soil, securing Ukraine's skies and seas, and rebuilding Ukraine's armed forces for the years to come."
Zelensky hailed that accord as a "huge step forward".
Twenty-four hours afterward, however, he seemed more cautious.
"I perceive the determination, the political resolve, and that the allies are prepared, and the allies are willing to give us robust economic measures, strong security guarantees," he said when questioned if nations in Europe would defend Ukraine.
"However, until we don't have such security guarantees - formally ratified, supported by parliaments, backed by the U.S. Congress - this question cannot be answered. And should they materialize, you still have to rely primarily on your inherent capabilities."
The Paris talks were also significant owing to the attendance of US President Donald Trump's peace envoys, Steve Witkoff and Jared Kushner.
Witkoff said the participating countries "largely finished" their work on agreeing security protocols.
Recently, the President indicated a settlement was "90% ready".
Questions of land and defense pledges have been at the center of outstanding matters for negotiators.
The Russian leader has consistently stated that Ukrainian troops must pull back from all of Ukraine's eastern Donbas or Moscow will take control, dismissing potential concessions over how to end the war.
The Ukrainian President has thus far rejected relinquishing any land, but has suggested that Ukraine could redeploy its forces to an agreed point - but only if Russia did the same.
Moscow now holds about 75% of the Donetsk region, and some 99% of the neighbouring Luhansk. The pair of oblasts form the industrial Donbas region.
It has been intensifying attacks against cities in Ukraine - with a focus on energy infrastructure. Moscow is also achieving incremental advances in capturing more Ukrainian territory.
Ukraine has hit back at objectives inside Russia with unmanned aerial vehicles, albeit with varying degrees of effectiveness.
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