The top diplomats of the U.S. and South Korea met on Sunday to discuss North Korea-related issues, signaling broad agreement on the need to denuclearize the Korean Peninsula.

But readouts from Washington and Seoul after the meeting hinted at possible differences of opinion on an end-of-war declaration, a measure that South Korean President Moon Jae-in has prioritized in recent months.

U.S. Secretary of State Antony Blinken met with South Korean foreign minister Chung Eui-yong on the sidelines of the G-20 summit in Rome on Sunday. South Korea’s foreign ministry readoutof the meeting said that there were “serious” discussions on