Russia-Ukraine updates: Putin suspends key US-Russia nuclear treaty in speech denouncing West

Ahead of the Group of 20 summit in Bali, Indonesia, next month, Russia indicated it may be open to a meeting between President Joe Biden and President Vladimir Putin, Russian Foreign Minister Sergey Lavrov said in an interview with news agency Interfax.

"We have repeatedly said that we never refuse meetings," Lavrov said, according to Interfax. "If a proposal is made, it will be considered by us."

The White House National Security Council pointed to a comment made by Biden on Thursday outside the White House.

When asked by a reporter if he would meet with Putin, Biden responded, "That remains to be seen."

-ABC News' Anastasia Bagaeva and Ben Gittleson

Russia is in a "desperate" position in its war in Ukraine and is running out of weapons and allies, according to the United Kingdom's top cyber spy.

"We believe that Russia is running short of munitions, it’s certainly running short of friends," Jeremy Fleming, director of the U.K. spy agency GCHQ, told BBC Radio in an interview Tuesday. "Russia and Russia's commanders are worried about the state of their military machine."

"The word I've used is 'desperate,'" he added. "We can see that desperation at many levels inside Russian society and inside the Russian military machine."

Russian President Vladimir Putin has ordered a series of missile strikes across Ukraine in the last 48 hours in retaliation for an attack on the strategically important Kerch bridge into Crimea over the weekend, with Fleming arguing that this will have depleted Moscow's dwindling arsenal.

"Russia, as we've seen in the dreadful attacks yesterday, still has a very capable military machine," he told BBC Radio. "It can launch weapons, it has deep, deep stocks and expertise. And yet, it is very broadly stretched in Ukraine."

-ABC News' Zoe Magee

At least 19 people have died since Russian missiles struck civilian and critical infrastructure targets across Ukraine on Monday, according to the Ukrainian State Emergency Service.

Another 105 people were injured in the attacks in over a dozen Ukrainian regions, including the capital Kyiv, where more than 30 fires broke out.

Ukrainian President Volodymyr Zelenskyy on Monday said Russia's missile assault on civilian targets across Ukraine showed Russia's "true face."

Eleven people have died and 64 are hurt across eight oblasts and the city of Kyiv, according to the Ukrainian State Emergency Service.

"The world once again saw the true face of a terrorist state that is killing our people," Zelenksyy said on Twitter. "On the battlefield & in peaceful cities. A country that covers its true bloody essence & goal with talks about peace. It proves that the liberation of is the only basis of peace & security."