Medical staff move a wounded youth on a stretcher inside a hospital after three blasts rocked Kabul on April 19, 2022. (AFP)

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.

A local source told Sputnik earlier in the day that an explosion occurred at the school in the capital's Dasht-e-Barchi district, killing more than 20 and injuring dozens.

This image of text books covered in blood as more than 30 young boys were slaughtered today in a predominantly Hazara neighbourhood of Kabul in a suicide explosion outside school gates is haunting.
Peace continues to remain a far cry for the people of Afghanistan 💔 pic.twitter.com/4eO4IYyjXb
— Shabnam Nasimi (@NasimiShabnam) April 19, 2022

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.