North Korean leader Kim Jong Un said an unspecified “crucial" incident in the country's fight against the deadly coronavirus had triggered a “great crisis” that endangered the isolated nation, state media reported Wednesday.

Kim, who was presiding over a meeting of the ruling Workers’ Party of Korea politburo a day earlier, scolded senior officials for failing to carry out strict anti-virus measures, the state-run Korean Central News Agency said.

Officials had been derelict in their duties, triggering the incident and "creating a great crisis in ensuring the security of the state and safety of the people," which "entailed grave consequences," KCNA quoted Kim as saying.