The Ukrainian intelligence service said in a statement that the prisoners were captured on 9 January and immediately after were “provided with all the necessary medical care as stipulated by the Geneva Convention” and taken to Kyiv.

“They are being held in appropriate conditions that meet the requirements of international law,” the intelligence service’s statement read.

The intelligence service said the prisoners do not speak Ukrainian, English or Russian, “so communication with them is carried out through interpreters of Korean, in cooperation with South Korean NIS (National Intelligence Service)”.

In a statement posted on Telegram and X, Zelensky said the soldiers were “talking to SBU investigators” and he had instructed the Security Service of Ukraine to grant journalists access to them.

“The world needs to know the truth about what is happening,” he added.

Zelensky also posted four photographs alongside his statement. Two show wounded men. One of the photos showed a red Russian military card.

The place of birth on the document is given as Turan, in the Tuva Republic, which is close to Mongolia.

The intelligence service said that when the prisoners were captured, one of the soldiers had a Russian military ID card issued in the name of another person with registration in the Tuva Republic. The other had no documents at all.

The intelligence service said that during interrogation, the soldier with the ID card told security personnel that he had been issued the document in Russia during the autumn of 2024.

He is alleged to have stated that at that time, some of North Korea’s combat units had one-week interoperability training.

“It is noteworthy that the prisoner…emphasises that he was allegedly going for training, not to fight a war against Ukraine,” the SBU statement said.

The intelligence service reported that he said he was born in 2005 and had been serving North Korea as a rifleman since 2021.