The five stranded Russian men rely on the meals provided by South Korean authorities while living at the airport's departure waiting room.
Ukrainian President Volodymyr Zelensky did not elaborate on when the escalation might occur.
The Russian army is planning to attack a hospital ward where civilians are receiving treatment.
Ukrainian Foreign Minister Dmytro Kuleba said Russian President Vladimir Putin will still lose the war despite putting more resources on the battlefield.
Jailed Russian opposition figure Alexei Navalny has spent New Year's Day in solitary confinement, the 10th time since he began his prison term.
Nearly 50% of foreign policy experts are anticipating Russia's collapse as a consequence of its invasion of Ukraine.
More than 6,900 Ukrainian civilians have now died as a result of Russian missile strikes.
Ukrainian soldiers used their weapons as instruments in a "shock-show orchestra" caroling posted by Ukraine's defense ministry on Friday.
Zaporizhzhia military administration chief Oleksandr Starukh said Russian forces continue to force Ukrainians to collaborate and raid communities.
The train carrying the corpses of Russian servicemen arrived at Russia's Kemerovo Oblast from Rostov-on-Don.
The Russian army used incendiary weapons to target the Ukrainian city of Kherson.
A UN report also detailed over a dozen cases involving gang rape and sexual assault of Ukrainian civilians by Russian soldiers.
The Russian army only gave Ukrainian detainees 40 seconds to eat their meal, according to a report.
The "I Want to Live" project was launched by Ukraine in September to allow Russian military personnel to surrender.
The hackers, who call themselves the United Resistance Headquarters, leaked more than 70 files.
On New Year's Day alone, more than 120 road accidents occurred in Ukraine, killing six people and leaving more than 140 injured.
Ukraine's military intelligence chief, Kyrylo Budanov, said he discovered the dead bodies while visiting the beleaguered Ukrainian city of Bakhmut.
Ukrainian spy chief Kyrylo Budanov said Ukraine will likely push to liberate its territories from Russian forces in the spring.
Ukrainian intelligence chief Kyrylo Budanov said Putin will likely die from cancer after Kyiv wins the war.
A Ukrainian infantry soldier said Russian troops would likely get trapped by the Dnipro River if they launch an attack amid the winter season.
Police in Kyiv, Ukraine, estimated that the Banksy mural is worth $243,900.
The recently discovered torture chamber was set up in a private home in the region's Oleksandrivka village.