Some experts believe the tests were used to improve its position against South Korea while others said they were devoted to increasing unity within the county amid U.S. led sanctions during the virus outbreak.

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North Korea has repeatedly said there has been no coronavirus outbreak on its soil. But many foreign experts are skeptical of that claim and have warned that a coronavirus outbreak in the North could become a humanitarian disaster because of the country’s chronic lack of medical supplies and fragile health care infrastructure.


The Associated Press contributed to this report