Peace on the Korean peninsula and inter-Korean cooperation must move in conjunction with North Korea’s denuclearization, U.S. Secretary of State Mike Pompeo said on Tuesday.

Speaking at a press briefing in Washington D.C., Pompeo reiterated U.S. expectations moving forward and said that he believes the South Korean government is in “complete” agreement, this in spite of recent signs of policy differences between the two allies.

“We have made clear to the Republic of Korea that we do want to make sure that peace on the peninsula and the denuclearization of North Korea aren’t lagging behind the increase in the amount of