What may be the most significant reshuffle of top North Korean officials in years by leader Kim Jong Un serves as a warning to the ruling elite, analysts say, including those he accused this week of causing a "great crisis" with coronavirus lapses.

Kim called a meeting of the ruling Workers' Party of Korea politburo on Tuesday and berated some party executives' neglect of duty, including failing to implement long-term measures to fight the pandemic, state media reported.

State media, often the only source of information on the workings of the secretive country, did not elaborate on the nature of the crisis.