North Korea often denounces protests like the one held Monday, but rarely in the name of the Supreme Command, which is headed by Kim Il Sung's grandson and North Korea's overall leader, Kim Jong Un.
The North's statement said it would refuse any offers of talks with the South until it apologized for the "monstrous criminal act."
"If the puppet authorities truly want dialogue and negotiations, they should apologize for all anti-DPRK hostile acts, big and small, and show the compatriots their will to stop all these acts in practice," the statement said. North Korea's official name is the Democratic People's Republic of Korea, or DPRK.
This year's festivities were mostly low key, with Pyongyang residents gathering in performance halls and plazas and taking advantage of subsidized treats, like shaved ice and peanuts. Last year's anniversary — the centennial of Kim Il Sung's birth — was marked with days of immense festivities and a massive military parade.
Instead of such grandiose events, the front page of the Rodong Sinmun, the Workers' Party newspaper, on Tuesday featured photos of Kim Jong Un at an orchestral performance with his aunt, Kim Kyong Hui, and other top officials. North Korean media also reported that he watched volleyball and basketball games between Kim Il Sung University of Politics and Kim Il Sung Military University.
But word of the protest in the South outraged some North Koreans, though North Koreans, too, have similarly used the image of South Korean officials in protests against Seoul. The former South Korean president was depicted as a rat, shown attacked by dogs and tied up and quartered. The North Korean military used his image for military practice
"A child will not ignore it if his parents are insulted," said Pyongyang resident Ri Jong Chol. "I'd like to say that we have to find the South Korean puppet traitors who insulted our top leaders, wherever they are, and put them to death."