North Korea has offered its first official confirmation that it has detained a US soldier who bolted into the country last month, releasing a statement through its propaganda outlet attributing unverified statements to the army private that criticised the United States.

One expert called the announcement “100% North Korean propaganda”.

There was no immediate verification that Private Travis King actually made any of the comments about his home country.

Pte King, who had served in South Korea and sprinted into the North while on a civilian tour of a border village on July 18, became the first American confirmed to be detained in the North in nearly five years.

The official Korean Central News Agency (KCNA), citing an investigation, reported that Pte King told them he decided to enter North Korea because he “harboured ill feelings against inhuman mistreatment and racial discrimination within the US army”.

The report said Pte King also expressed his willingness to seek refuge in North Korea or a third country, saying he “was disillusioned at the unequal American society”.

KCNA is a propaganda outlet and an official voice of leader Kim Jong Un’s government, and its content is carefully calibrated to reflect North Korea’s official line that the United States is an evil adversary.

The report said North Korea’s investigation into Pte King’s “illegal” entry would continue.

Verifying the authenticity of the comments attributed to Pte King in North Korea’s state media is impossible.

The United States, South Korea and others have accused North Korea of using foreign detainees to wrest diplomatic concessions.

Some foreign detainees have said after their releases that their declarations of guilt while in North Korean custody were made under coercion.

A US Defence Department official said the US had no way to verify North Korea’s claims about Pte King.

The official said the Pentagon was working through all available channels to bring Pte King back to the US.

“This is 100% North Korean propaganda in its element. King, as an American citizen held in North Korea, has no sway in how (North Korea) chooses to cast its narrative,” said Soo Kim, an expert with Virginia-based consultancy LMI and a former CIA analyst.

“As for King’s release, his fate rests in North Korea’s hands. Perhaps the regime will try to ‘bargain’ King’s life in exchange for financial concessions from the US. More than likely, negotiations won’t be easy, and terms will be dictated by Pyongyang,” she said.

The soldier’s family said his mother, Claudine Gates, is appealing to North Korea to treat her son humanely.

“She’s a mom worried about her son and would be grateful for a phone call from him,” family spokesman Jonathan Franks said in the statement.

“Lastly, she has been in touch with the Army this evening and appreciates a (Defence Department) statement that it remains focused on bringing Travis home.”

Tae Yongho, who was a minister at the North Korean embassy in London before his defection in 2016, speculated that North Korea might release Pte King eventually because it did not immediately express its intentions of accepting Pte King as a refugee in the North and spoke about a third country resettlement.

Mr Tae, now a legislator in South Korea, also cited North Korea’s description of Pte King as an illegal entrant, rather than someone who “voluntarily” entered the North.

Mr Tae earlier said North Korea would be reluctant to hold a low-ranked soldier such as Pte King for long because he will not provide it with high-profile US intelligence and would require high costs and resources to manage his life.

Some analysts have said North Korea might try to tie Pte King’s release to the US cutting back its military activities with South Korea, amid heightened animosities between the wartime foes.

North Korea has conducted more than 100 weapons tests since the beginning of last year, many of them in the name of issuing warnings over the expansion of US-South Korean military drills.

Next Monday, the allies are to begin major annual drills, which North Korea views as an invasion rehearsal.

The leaders of the United States, South Korea and Japan are also expected to announce plans for expanded military co-operation on ballistic missile defence in the face of North Korea’s evolving nuclear threats when they meet for a trilateral summit at Camp David on Friday, according to US officials.

On Tuesday, North Korea slammed US-led plans for an open UN Security Council meeting on its human rights record as “despicable” and only aimed at achieving Washington’s geopolitical ambitions.

North Korean vice foreign minister Kim Son Gyong said the council must first deal with the American human rights issue, calling the United States a depraved “empire of evils”.

In a statement carried by state media, Mr Kim accused the US of fostering racial discrimination, gun-related crimes, child maltreatment and forced labour.

Pte King, 23, was among about 28,000 US troops stationed in South Korea as deterrence against potential aggression from North Korea.

At the time he joined the civilian tour and crossed the border, he was supposed to be heading to Fort Bliss, Texas, following his release from prison in South Korea on an assault conviction.

US officials say he has been declared Awol, which can be punished by confinement in the brig, forfeiture of pay or dishonourable discharge with the severity based on their time away and whether they were apprehended or returned on their own.

The United States and North Korea, which fought during the 1950-53 Korean War, are still technically at war since that conflict ended in a truce, not a peace treaty.

They have no diplomatic ties and Sweden provided consular services for Americans in past cases, though Swedish diplomats reportedly have not returned to North Korea since the beginning of the Covid-19 pandemic.