The Secretary-General of the UN, Antonio Guterres, condemns the recent explosive attacks on schools in Kabul, Afghanistan, where over 20 people were killed, according to a spokesperson for the UN Stephane Dujarric on Tuesday. 

“The Secretary-General condemns the deadly attacks on schools in Kabul. He extends his deepest condolences to the families of the victims and wishes a swift recovery to those injured. Attacks against civilians and civilian infrastructure, including schools, is strictly prohibited under international humanitarian law,” Dujarric said during a press briefing. 

Earlier today, three explosions were reported on school grounds in Kabul, Afghanistan's capital, on Tuesday morning, according to the city's security department.

"Three different explosions at the Abdul Rahim Shahid High School in the 18th District resulted in casualties among our Shiite compatriots," police said in a statement as quoted by Sputnik.

Furthermore, a local source confirmed that an explosion occurred at the school in the capital's Dasht-e-Barchi district, killing more than 20 and injuring dozens.

Prior to that, an explosion occurred on the grounds of the Mumtaz school, also on Kabul's western outskirts. Several people were injured in the explosion, according to an eyewitness.