S Korea to mark summit anniversary, with or without North

South Korea will this week celebrate the first anniversary of a landmark summit between President Moon Jae-in and North Korean leader Kim Jong Un -- but Pyongyang may not take part, Seoul said Monday.

The pair held their first meeting on April 27 last year in the Demilitarised Zone dividing the peninsula amid a rapid diplomatic thaw, paving the way for a historic summit between Kim and US President Donald Trump in Singapore in June.

But one year later, little progress has been made on North Korea's denuclearisation, with Pyongyang and Washington deadlocked since a second summit between Trump and Kim in Hanoi in February broke down without a deal.

Moon, who brokered the first meeting between the two mercurial leaders, has tried to salvage the diplomacy although the North has remained largely unresponsive.

Since Hanoi, the North has not attended any of the eight regular weekly meetings of the heads of their joint liaison office in Kaesong, and has not taken part in other joint projects, such as excavations in the DMZ.

Seoul will hold a ceremony on Saturday at Panmunjom -- where Moon and Kim exchanged warm smiles and brotherly hugs -- the unification ministry said, but