Russian President Vladimir Putin has offered the encircled troops time to lay down their arms in exchange for their lives

Russian President Vladimir Putin's offer to Ukrainian forces in Kursk Region to surrender is still valid, but time is running out, Kremlin spokesman Dmitry Peskov has said.

"It is still in effect," he stated on Saturday in response to a question from TASS news agency. "Their time is shrinking like the Shagreen skin," he added, in reference to Honore de Balzac's novel 'The Magic Skin'.

On Friday, Putin guaranteed merciful treatment to Ukrainian fighters encircled in Kursk Region if they surrender. "If they lay down their arms and surrender, we will guarantee them their lives and dignified treatment in accordance with international law and Russian legal norms," the president said. He indicated, however, that Kiev should order them to do so.

Putin's statement was a response to US President Donald Trump's call to spare the lives of the "thousands of Ukrainian troops" who are "completely surrounded by the Russian military."

"This would be a horrible massacre, one not seen since World War II," he commented on Truth Social.

Kiev launched a major offensive into Kursk Region in August 2024, successfully capturing the town of Sudzha along with numerous villages. Ukraine's Vladimir Zelensky stated that the incursion across the internationally recognized border aimed to secure leverage for future peace negotiations.

However, the Russian military quickly halted the Ukrainian advance and has since been regaining territory. As of Wednesday, 86% of the land occupied by Ukraine was reclaimed, according to General Valery Gerasimov, the head of the Russian General Staff. He noted that the remaining Ukrainian units in the area are largely "encircled" and "isolated."