SEOUL (Reuters) - North Korea lambasted South Korea’s President Moon Jae-in on Friday for “needlessly kibitzing” about relations between Pyongyang and Washington and dismissed Moon’s pledge to take the driver’s seat on the Korean Peninsula as “sophistry”.

South Korea's President Moon Jae-in speaks at the ISEAS 42nd Singapore Lecture in Singapore July 13, 2018. REUTERS/Edgar Su/File Photo

North Korean state media, which has often derided the South and its former presidents as a “puppet” of U.S. hostile forces, has notably refrained from criticizing the Moon administration especially after this year’s thaw in relations.

The Rodong Sinmun, North Korea’s official party newspaper, slammed Seoul’s recent praise of its own efforts to bring about the first inter-Korean summit in more than a decade in April, and an unprecedented summit between North Korea and the United States, under the liberal president’s peace initiative.

“It’s a self-exalting, farfetched allusion and vain kibitzing without realizing their own circumstances,” the Rodong Sinmun said in a commentary.

The newspaper did not mention Moon by name but pointed to his remarks during a visit to Singapore last week that North Korea and the United States would face the “stern judgment” of the international community if their leaders fail to keep the promise they publicly made.

North Korean leader Kim Jong Un and U.S. President Donald Trump agreed to work toward denuclearisation at their summit in Singapore on June 12, but there has been no sign of concrete action. Seoul’s Unification Ministry said it has no comment on the North’s denouncement.

Moon’s initiative to play a central role is “nonsensical sophistry,” said the newspaper, accusing Seoul of caring only about the view of its “master” Washington and failing to take any practical steps to fundamentally improve inter-Korean relations.

“It’s a known fact inside and outside that the South does not have the capability to resolve the peninsula affairs and elicit an agreement,” the report said.

“When we and the United States are making efforts to implement the Singapore agreement, who would listen to such rude, atrocious sophistry with a presumptuous forecast lacking reality?”

Shin Beom-chul, a senior fellow at the Asan Institute for Policy Studies in Seoul, said the latest criticism could be intended to weaken ties between the South and the United States, and strengthen the North’s edge in cross-border relations.

“They are trying to tell the South not to rely on the alliance too much or they won’t talk, which would make Moon’s policy a failure, while seeking some leeway on sanctions,” Shin said.

In another attack against the Moon administration, Uriminzokkiri, a North Korean propaganda website, urged it to repatriate a dozen North Korean restaurant workers who came to the South in 2016.

The 12 had worked at a North Korean restaurant in China. Pyongyang claims they were abducted by South Korean authorities. The South has said the workers defected of their own free will.

Uriminzokkiri said there could be an “obstacle” in the planned reunion of families divided by the 1950-53 Korean War next month if the workers are not returned.

It lashed out at Unification Minister Cho Myoung-gyon by name, accusing him of “siding with” the former government which it said plotted the workers’ defection.

A ministry spokeswoman refused to comment, but stressed that the family reunions were agreed by Moon and Kim during their first summit in April.