SEOUL, South Korea — North and South Korea reached Monday a cautious agreement to hold a high-level meeting in Seoul, following marathon talks aimed at rebuilding trust after months of soaring tension and threats of nuclear war.

Sunday's preparatory talks, held in the border truce village of Panmunjom where the armistice ending the 1950-53 Korean War was signed, were the first between the two rivals for more than two years.

In a sign of the trust deficit that remains six decades after the armistice agreement, the talks dragged on deep into Monday morning as the two sides struggled to agree to a framework for a more substantive dialogue.

They concluded by settling for a two-day meeting in the South Korean capital beginning Wednesday, but with some confusion over precisely who would attend and what topics would be discussed.

"Both sides issued separate statements on the outcome of discussions after failing to narrow differences over the level of chief delegate and agenda," the South's Unification Ministry said.

Agreed topics for discussion in Seoul included the future of the Kaesong joint industrial complex that the North effectively shut down as the recent military tensions between the historic rivals peaked.

The resumption of South Korean civilian tours to the North's Mount Kumgang resort and reunions between families divided since the Korean War will also be considered, the separate statements said.

Sunday's talks came about after an unexpected reversal from North Korea, which suddenly dropped its default tone of high-decibel belligerence and proposed opening a dialogue.

South Korea responded swiftly and positively by offering a meeting in Seoul between its Unification Minister and his North Korean counterpart, which Sunday's talks in Panmunjom were meant to set up.

The two Koreas have not held ministerial talks since 2007.

In the end, it was unclear who exactly would attend, with the North and South statements vaguely alluding to "authorities" with ministerial-level responsibilities.

"Inter-Korean talks have always been like this — pretty opaque with lots of ups and downs, and ins and outs," said Yang Moo-Jin, a professor at the University of North Korean Studies in Seoul.

"The Seoul meeting will probably go ahead, but in the past North Korea has often delayed or canceled talks at the last minute over some procedural matter," Yang said.

The move towards dialogue has been broadly welcomed — given the threats of nuclear war that were being flung around in April and May — but there is some general skepticism about Pyongyang's intentions.

Some analysts have suggested the North is paying lip-service to the idea of talks to coincide with the weekend summit between President Barack Obama and Chinese President Xi Jinping.

China, the North's sole major ally and economic benefactor, has been under US pressure to restrain its neighbor and has pushed Pyongyang to engage in dialogue rather than seek confrontation.

The commercial nature of the Kaesong and Mount Kumgang projects, which both sides have agreed to address in Seoul, offers some scope for relatively pragmatic discussion.

Kaesong and Mount Kumgang were both significant sources of scarce foreign currency for North Korea, which is squeezed by U.N. sanctions imposed over its nuclear weapons program.

Operations at Kaesong were suspended after the North withdrew its 53,000 workers from the South Korean plants there in early April.

Seoul suspended tours to Mount Kumgang after a North Korean soldier shot dead a South Korean tourist there in July 2008.

"They might discuss other issues as well, but this conservative administration in Seoul clearly wants to keep the official agenda tightly focused," said professor Yang.

South Korean President Park Geun-Hye took office in February with a promise of greater engagement with Pyongyang.

But she remains adamant that substantive dialogue on wider issues can only take place if the North shows some tangible commitment to abandoning its nuclear weapons program.

North Korea has been equally emphatic in declaring its nuclear deterrent is not up for negotiation.

It was the North's nuclear test in February — and subsequent U.N. sanctions — that triggered the recent crisis, which saw Pyongyang threaten both the South and the United States with pre-emptive nuclear strikes.