The United States, Japan and South Korea warned on Wednesday that an "unparalleled" scale of response would be warranted if North Korea conducts a seventh nuclear bomb test.
Washington and its allies believe North Korea could be about to resume nuclear bomb testing for the first time since 2017.
"We agreed that an unparalleled scale of response would be necessary if North Korea pushes ahead with a seventh nuclear test," South Korean First Vice Foreign Minister Cho Hyun-dong told a news conference in Tokyo.
