S Korea

The declaration came as the number of Covid cases among students and teachers has recently exceeded 2,000 in one and a half months after the spring semester began in early March, Yonhap reported.

Koo Yoon-cheol, chief of the Office for Government Policy Coordination, said during an emergency vice-ministerial meeting that the South Korean government "expresses strong regret and will take all necessary measures for the safety of our people", Xinhua reported.

This is the first trip to Iran by a South Korean Prime Minister in 44 years. During his three-day visit, Chung will meet with President Hassan Rouhani, First Vice President Eshaq Jahangiri, Parliament Speaker Mohammad Baqer Qalibaf, and former Parliament Speaker Ali Larijani to discuss issues of mutual interest, reports Xinhua news agency.