Seoul (CNN) North Korea has acknowledged for the first time that February's Hanoi summit between its leader, Kim Jong Un, and US President Donald Trump ended "unexpectedly without an agreement."

Despite previously painting the Trump-Kim summit in Vietnam in a positive light, state news agency KCNA said on Friday that the meeting hadn't gone as well as expected.

North Korean leader Kim Jong Un with US President Donald Trump in Hanoi.

"The public at home and abroad that had hoped for success and good results from the second DPRK-US summit in Hanoi are feeling regretful, blaming the US for the summit that ended unexpectedly without an agreement," the report said.

KCNA had previously showcased the Trump-Kim summit through a carefully edited documentary , presenting a triumphant arrival by Kim in his bullet-proof train , to huge crowds lining the streets for a glimpse of his motorcade.

The US hoped the summit would demonstrate the success of Trump's diplomatic gamble with North Korea, but instead the meeting ended with no joint agreement , after Kim demanded all US sanctions be lifted on his country.

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