In its announcement, North Korea said Tuesday's move was a response to South Korea's failure to stop activists from floating anti-Pyongyang leaflets across their borders
Kim Jong-un has been out of public view since he was last seen on April 11 chairing a major party meeting, reports Yonhap News Agency
The US and the North last held their working-level nuclear talks in Sweden in October 2019
The rally was held in Pyongyang to denounce the US for starting the Korean War on June 25, 1950