North Korea said it will not participate in the Tokyo Olympics because of the coronavirus pandemic.

A website run by the North’s sports ministry said the decision was made during a national Olympic Committee meeting on March 25 where members prioritized protecting athletes from the “world public health crisis caused by COVID-19.”

South Korea’s Unification Ministry on Tuesday expressed regret over the North’s decision, saying it had hoped that the Tokyo Olympics would provide an opportunity to improve inter-Korean relations, which have declined amid a stalemate in larger nuclear negotiations between Washington and Pyongyang.

Japanese Olympic Minister Tamayo Marukawa told reporters she was still confirming details and couldn’t immediately comment on the matter.

North Korea sent 22 athletes to the 2018 Winter Olympics in South Korea, along with government officials, performance artists, journalists and a 230-member all-female cheering group.