North Korea's leader Kim Jong Un and US President Donald Trump look on during the extended bilateral meeting in the Metropole hotel during the second North Korea-US summit in Hanoi, Vietnam on Feb 28, 2019. (Photo: Reuters/Leah Millis)

SEOUL: North Korean state media called on the United States on Tuesday (Jun 11) to "withdraw its hostile policy" towards Pyongyang or agreements made at a landmark summit in Singapore a year ago might become "a blank sheet of paper".