- US mulling drastic sanctions if Russia invades Ukraine
- Kremlin says it expects no breakthroughs in talks
- Urges everyone to keep 'a cool head'
- EU says prepared to increase sanctions against Russia
US President Joe Biden and Russian President Vladimir Putin began virtual talks on Ukraine and other subjects on Tuesday, Russian state television reported, amid Western fears that Moscow plans to attack its southern neighbour.
Biden will tell Putin that Russia and its banks could be hit with the toughest economic sanctions yet if it invades Ukraine, US officials said before the video conference.
They said the sanctions, which one source said could target Russia's biggest banks and Moscow's ability to convert roubles into dollars and other currencies, were designed to dissuade Putin from using tens of thousands of troops massed near the Ukrainian border to attack its southern neighbour.
The Kremlin, which said before the meeting it did not expect any breakthroughs, has denied harbouring such intentions and has said its troop posture is defensive.
But Moscow has voiced rising vexation over Western military aid to Ukraine, a fellow former Soviet republic that has tilted towards the West since a popular revolt toppled a pro-Russian president in 2014, and what it calls creeping NATO expansion.
Moscow has likewise questioned Ukrainian intentions and said it wants guarantees that Kyiv will not use force to try to retake territory lost in 2014 to Russia-backed separatists, a scenario Ukraine has ruled out.
"We're looking for good, predictable relations with the United States. Russia has never intended to attack anyone, but we have our concerns and we have our red lines," said Kremlin spokesperson Dmitry Peskov.
Calling for everyone to keep "a cool head", Peskov said it was vital that Putin and Biden speak given what he called the extraordinary escalation of tensions in Europe.
The Russian rouble weakened slightly on Tuesday, with some market analysts predicting the talks would de-escalate tensions and others saying that the US sanctions threat eroded hopes of finding common ground.
Ahead of his first direct talks with Putin since July, Biden discussed the sanctions plan with European allies on Monday, seeking a strong joint stance in support of Ukraine's territorial integrity and sovereignty.
He spoke to French President Emmanuel Macron, German Chancellor Angela Merkel, Italian Prime Minister Mario Draghi and British Prime Minister Boris Johnson.
They called on Russia to defuse tensions and return to diplomacy and said their teams would stay in close touch, including in consultation with NATO allies and EU partners, on a "coordinated and comprehensive approach", the White House said.
Biden's team has identified a set of economic penalties to impose should Russia launch an invasion, a senior Biden administration official said.
A separate source familiar with the situation said targeting Putin's inner circle has been discussed but no decision made. Sanctions against Russia's biggest banks and curbing the conversion of roubles into dollars and other currencies were also being considered, another source said.
The European Union's chief executive offered Ukraine the European Union's full support on Tuesday and said that the bloc would consider more sanctions on Russia.
"We will respond to any further aggressions by scaling up and expanding existing sanctions," European Commission President Ursula von der Leyen said on Twitter. "We are ready to take additional restrictive measures, in coordination with our partners."