The Kremlin has issued a series of demands following a watershed meeting between Russian and American officials - where the fate of Ukraine was discussed for hours without Kyiv having a seat at the table.
Delegations from Moscow and Washington met in Saudi Arabia for talks aimed at improving relations and negotiating an end to the war, the outcome of which Ukrainian President Zelensky has repeatedly said his country would not accept.
'We cannot recognise any things or agreements about us without us. And we will not recognise such agreements,' Zelensky said on Monday, adding that previously 'it was like bad manners to talk to an aggressor during wartime.'
US and Russian officials engaged in four-and-a-half hours of negotiations, which the Kremlin said 'went well' and are now complete.
In the aftermath of the discussions, Moscow has been laying out its demands and stipulations for peace talks, warning that a lasting settlement in Ukraine is 'impossible' without addressing the wider issue of European security.
'A lasting and long-term viable resolution is impossible without a comprehensive consideration of security issues on the continent,' Kremlin spokesman Dmitry Peskov told reporters.
Peskov stated last week that Moscow wanted to use talks with the US to address Russian 'concerns' about the security situation in Europe. While he did not go into further detail, the Kremlin has demanded in recent years that NATO roll back to its 1997 borders.
Russian foreign ministry spokeswoman Maria Zakharova later said that Moscow wants NATO to disavow its 2008 promise to one day give Ukraine membership of the US-led military alliance.
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The US and Russian delegations have been pictured attending the bilateral meeting at the Diriyah Palace this morning
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British PM Sir Keir Starmer met with European leaders at the Elysee Palace yesterday
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The Ukrainian President hit out at Europe, describing it as militarily 'weak' and unprepared to face off further Russian aggression
NATO membership for Ukraine is unacceptable for Russia, Zakharova said, adding that a simple refusal to accept Ukraine into NATO is also not enough for Russia.
'It is worth noting that a refusal to accept Kyiv into NATO is not enough,' she said. 'The alliance must disavow the Bucharest promises of 2008.'
At a summit in the Romanian capital in 2008, NATO declared that both Ukraine and Georgia would join the US-led defence alliance - but gave them no plan for how to get there.
NATO's official position - which has been consistently endorsed by Sir Keir Starmer's Government - is that Kyiv is on an 'irreversible' path to joining the alliance.
Regarding Kyiv's wish to join NATO, Peskov said today that while Ukraine had the 'sovereign right' to join the European Union, Russia was opposed to Kyiv joining NATO.
'With regard to Ukraine joining the EU, it is the sovereign right of any country, but it is completely different when it comes to security issues and military alliances. Here we have a different approach that is well known,' he warned.
In further comments at the press conference today, Peskov taunted Kyiv by saying that Putin was ready to talk to Zelensky 'if necessary', before questioning his legitimacy as Ukrainian president.
'Putin himself said that he would be ready to negotiate with Zelensky if necessary but the legal basis of agreements needs discussion considering the reality that Zelensky's legitimacy can be questioned,' Peskov told reporters.
The meeting in Riyadh marks a major step by the Trump administration to improve relations with Moscow and reverse US policy on isolating Russia , and is meant to pave the way for a meeting between President Trump and dictator Vladimir Putin .
Trump earlier this month upended US policy by holding a surprise phone call with Putin about beginning negotiations, sparking panic in Kyiv and among European allies that they will be frozen out of talks.
It comes amid mounting fears in Europe that Trump will withdraw the US security umbrella over the continent and leave the Baltic states at Putin's mercy.

Putin 's foreign minister Sergei Lavrov yesterday declared that Moscow has no plans to give territory it has seized in Ukraine over to Kyiv

Olaf Scholz (pictured today) said calls for peacekeeping troops were 'premature,' adding: 'I am even a little irritated by these debates, I want to say that quite frankly'
Sir Keir Starmer called for the US to provide a 'backstop' for any deal in Ukraine yesterday as European leaders desperately tried to put on a united front in support of Kyiv ahead of today's talks.
But the crisis summit in Paris ended in chaos, with German Chancellor Olaf Scholz leaving early and saying he was 'a little irritated' by 'premature' plans being made 'over Ukraine's head'.
After Putin officials gloated that today's talks would be 'purely bilateral' and would not include Ukrainian officials, US and Russian delegations were pictured this morning attending the meeting at Riyadh's Diriyah Palace.
The top officials in attendance include US secretary of state Marco Rubio, national security adviser Mike Waltz and special envoy Steve Witkoff with Putin's foreign minister Sergei Lavrov and foreign affairs adviser Yuri Ushakov on the Russian side.
The talks mark a significant expansion of US-Russian contacts, nearly three years into a war that has seen ties fall to the lowest level in decades.
The recent US diplomatic blitz on the war has sent Kyiv and key allies scrambling to ensure a seat at the table amid concerns that Washington and Moscow could press ahead with a deal that will not be favourable to them.
France called an emergency meeting of European Union countries and the UK on Monday to decide how to respond.
Sir Keir Starmer told a press conference following the three-hour talks at Elysee Palace that Europe 'had to do more' to protect the continent and reiterated his vow to send British soldiers to Ukraine.
Yet fractures appear to have already formed in any unified response, border with Poland, Spain, and Italy joining Germany in raising doubts about the Prime Minister's suggestion.
Scholz said calls for peacekeeping troops were 'premature,' adding: 'I am even a little irritated by these debates, I want to say that quite frankly.
'The discussion is being held over Ukraine's head, over the outcome of peace talks that have not taken place and to which Ukraine has not said yes...
'This is highly inappropriate, to put it bluntly, and honestly: we don't even know what the outcome will be.'

Trump earlier this month upended US policy by saying he had held a phone call with Putin about beginning negotiations
Polish Prime Minister Donald Tusk told reporters in Paris: 'Everyone at this meeting is aware that transatlantic relations, the NATO alliance and our friendship with the United States have entered a new phase.'
NATO chief Mark Rutte said the Europeans were 'ready and willing' to step up, while EU commission chief Ursula von der Leyen called for a 'surge' in defence.
The Saudi-owned satellite channel Al Arabiya, citing the Russian delegation, described Moscow's priority in today's talks with the US as 'real normalisation with Washington'.
Ahead of the talks, Kirill Dmitriev, the head of the Russian Direct Investment Fund, who is acting as an economic negotiator for Moscow, declared that 'good US-Russia relations are very important for the whole world.'
'Only jointly can Russia and the US address lots of world problems, resolve for global conflicts and offer solutions,' said Dmitriev.
He said following the meeting that Russia expects 'progress' on economic discussions with the US in the coming months.
But rather than covering broader relations between the two powers, US officials have sought to cast today's talks as a follow-up to the call between Trump and Putin and an initial contact between the two parties to determine whether Moscow is serious about ending the war.
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State Department spokesperson Tammy Bruce told reporters: 'This is a follow-up on that initial conversation between Putin and President Trump about perhaps if that first step is even possible, what the interests are, if this can be managed.'
However the Kremlin suggested the discussions would cover 'the entire complex of Russian-American relations' as it seemingly seeks to make the most of its open communication with Washington.
Lavrov and then-US secretary of state Antony Blinken talked briefly on the sidelines of a G20 meeting in India nearly two years ago, and in the autumn of 2022, US and Russian spymasters met in Turkey amid Washington's concerns that Moscow could resort to nuclear weapons amid battlefield setbacks.
Diriyah Palace sits across the street from Riyadh's diplomatic quarter.
It is also just next to the Ritz Carlton hotel, which became well known in 2017 after de facto leader Crown Prince Mohammed bin Salman detained other princes and the country's elite there as part of what the royal court called a crackdown on corruption, which also sidelined any potential challenge to his taking control of the kingdom.
Hosting the talks is a major step towards a goal Prince Mohammed has pursued throughout the war - putting the kingdom in the middle of diplomatic negotiations.
It has helped in prisoner negotiations and hosted Zelensky for an Arab League summit in the kingdom in 2023. Zelensky is set to travel to Saudi Arabia later this week.
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Ukrainian President Volodymyr Zelenskyy pictured with Sheikh Mohamed bin Zayed al-Nahyan in Abu Dhabi -- February 17, 2025
For Prince Mohammed, once described as a 'pariah' by former US president Joe Biden over the 2018 killing of Washington Post journalist Jamal Khashoggi, hosting such talks burnish the otherwise-tarnished image the West has for him.
Ahead of the summit, the Saudi daily newspaper Okaz described the moment as the 'world's eye on Riyadh'.
Writing in the London-based but Saudi-owned newspaper Asharq Al Awsat, journalist Mishari al-Dhaidi described the summit as 'a major step on the international political chess arena, revealing the status of Saudi Arabia and its positive influence for the benefit of the people all the people'.
Hosting the summit also balances the harsh criticism recently levied by the kingdom's tightly controlled media at Trump over his repeated comments that he wants the US to 'own' the Gaza Strip, which has been devastated by the Israeli military offensive there since the October 7, 2023, Hamas attack.
The Palestinians want Gaza and the West Bank for a future state, something backed by the wider Arab world and nearly all of the international community.