The May 3 gunfire exchange was the first shooting inside the Korean Demilitarized Zone in about 2½ years.
The United Nations on Tuesday called for an immediate reduction of violence in Afghanistan.
Except for a virtual meeting on April 9, the Security Council has remained silent on the global COVID-19 pandemic.
Guterres said “there should be only one fight in our world today: our shared battle against COVID-19.”
UN Secretary-General Antonio Guterres appealed Monday for an "immediate global ceasefire" to protect vulnerable civilians.
Libya has been in turmoil since 2011.
The government used its platform at the U.N. to tell the insurgents: "Join us in peace, or we will continue to fight."
Four people were injured in the attack and, while there were no deaths, it marked the first known chemical attack in a year.
Foreign Minister Walid al-Moallem says the U.S. and Turkey maintain an illegal military presence in northern Syria.
The U.N. documented 1,366 civilians killed and 2,446 wounded in its latest report on Afghan noncombatant casualties.