Russia-Ukraine updates: 2 US veterans who joined Ukrainian forces missing

Ukrainian President Volodymyr Zelenskyy spoke Monday at the World Economic Forum in Davos, Switzerland, calling on the West to recognize as a mistake the refusal to impose preventive sanctions on Russia and take decisive steps in that direction.

"We must not react, but act preventively," Zelenskyy told the forum in a virtual address. "And not only adapt what we have to the new realities, but create new tools. ... Do not wait for fatal shots. Do not wait for Russia to use chemical, biological or, heaven forbid, nuclear weapons. Do not give the aggressor the impression that the world allegedly will not offer sufficient resistance. Protect immediately to the maximum freedom and a normal, useful world order."

Zelenskyy said there are still no such sanctions against the Russian Federation, and listed them:

- Complete embargo on Russian oil.
- Complete blocking of all Russian banks.
- Complete rejection of the Russian IT sector.
- And complete cessation of trade with the aggressor.

Zelenskyy also called for freezing and confiscating Russian assets around the world and sending them to a special fund to pay compensation and restore Ukraine.

"There should be a precedent for punishing the aggressor. ... Russian assets scattered across different jurisdictions should be found, arrested or frozen, and then confiscated and sent to a special fund, from which all victims should receive compensation," Zelenskyy said.

He warned it will not be easy, but added that various aggressors will definitely not be motivated to do what Russia has done and continues to do in Ukraine.

Zelenskyy said he believes the world is at a turning point and that the future of not only Ukraine, but the whole world, depends on the resistance to brutal force.

“This year, the words 'turning point' are not just a rhetorical figure of the speech," Zelenskyy said. "Now is really such a moment when it is decided whether brutal force will dominate the world. If it dominates, then our thoughts are not interesting to it, and we can no longer gather in Davos. For what? Brutal force is looking for nothing but subjugation of those whom it wants to subdue, and it does not debate, but kills immediately, as Russia is doing in Ukraine right now -- at this time when we are talking to you."

-ABC News' Guy Davies

Lithuania is suspending all imports of Russian oil, natural gas and power, the country’s energy minister Dainius Kreivys announced in a statement Sunday, making it the only country in the European Union to suspend all imports on Russian energy.

Lithuania is now receiving liquified gas from the U.S. after becoming the first EU country to suspend Russian gas imports in April, Kreivys said. The country is now generating electricity via local power generation and local EU imports via existing connections with Sweden, Poland and Latvia.

It is unclear what alternate source of oil Lithuania will rely on, but Kreivys’ statement indicates that its sole importer of oil, Orlen Lietuva, refused to import Russian oil more than a month ago, Kreivys said.

The move is an expression of solidarity with Ukraine, Kreivys said, adding that it cannot allow its money to finance a Russian war machine.

The EU stated stated in March that it would end its dependency on fossil fuels imports from Russia and made plans to phase out Russian oil, gas and coal. The European Commission presented details on how it plans to achieve that last week.

-ABC News' Christine Theodorou

While Ukraine has rarely reported on its combat losses since the Russian invasion began in late February, President Volodymyr Zelenskyy announced during a press briefing Sunday that 50 to 100 Ukrainian soldiers are being killed every day.

The last time Zelenskyy revealed military death toll figures was in April, when he said that around 3,000 Ukrainian soldiers had been killed in action and around 10,000 wounded. Zelenskyy did not provide a total figure for combatants killed in action on Sunday.

Since the start of the invasion, most Ukrainian men ages 18 to 60 have been banned from leaving the country. On Friday, a petition calling for the government to cancel the ban was registered with the president’s office.

The petition surpassed the 25,000-signature threshold that requires the president to address it on Sunday. Zelenskyy acknowledged the petition during Sunday's briefing.

"How would I explain that to relatives of our defenders who are fighting at the most difficult positions in the East, where 50 to 100 troops lose their lives every day?"

Ukraines parliament voted to extend martial law through Aug. 23. Zelenskyy’s office has a few weeks to consider the petition.

-ABC News' Christine Theodorou

Ukrainian President Volodymyr Zelenskyy extended a warm welcome to Polish President Andrzej Duda on Sunday amid his bid to have his country join the European Union.

During a parliamentary session, Zelenskyy expressed his gratitude to all Poles for their support, making it clear that pushing full steam ahead to ensure Ukraine is granted candidate status.

"I am sure that all the necessary decisions will be made first for the status of a candidate for Ukraine, and then for full membership," he said. "In particular, thanks to Poland's many years of protection of Ukrainian interests on the European continent."

Shortly after Zelenskyy and Duda addressed lawmakers, the parliament session was briefly interrupted when air sirens sounded in Kyiv, and members of parliament were moved to a shelter. The Ukrainian regional military administration later confirmed a Russian missile was intercepted over the Kyiv region.

France's Minister for European Affairs Clément Beaune in his interview with France TF1 radio said on Sunday that it could take 15 to 20 years for Ukraine to become an EU member state, adding that Kyiv could enter the European political community proposed by French President Emmanuel Macron in the meantime.

-ABC News' Christine Theodorou