The funeral of the victims of a series of attacks near a Kabul high school on Saturday is known to have killed more than 50 people.
The explosion occurred as students left the building. Authorities say most of the victims were girls.
No has admitted to carrying out attacks in ISIS-A-Bacha, an area frequently attacked by Sunni Islamist militants.
Afghan government officials blamed Taliban militants for the attack, but the group denied any involvement.
Malala Yousafzai, a Nobel laureate and activist who was shot in the head by the Taliban in 2012, posted on Twitter about the “horrific attack.”
“My heart goes out to the families of the victims of the Kabul school,” he wrote.
The exact target of Saturday’s bloodshed is unclear. The explosions come amid a rise in violence, with the U.S. expecting to withdraw all troops from Afghanistan by September 11.
What happened on Saturday?
The blast is believed to have caused by a car bomb and two improvised explosive devices buried in the area.
Zahra, a survivor, told reporters she was leaving school when the explosion occurred.
“My classmate is dead. A few minutes later there was another explosion, followed by another explosion. Everyone was screaming and there was blood everywhere.”
Several witnesses described hearing three separate explosions, while a woman named Reza told AFP she “saw many bloodied bodies in dust and smoke.”
Reza said; “I saw a woman examine the body and call her daughter. Then, after finding her daughter’s bloodstained bag, she passed out on the floor.
More than 100 people were injured in the attack. Reports from Kabul say the city is busy with buyers ahead of next week’s Eid-ul-Fitr celebrations.
Najiba Arian, ministry of education representative, told Reuter’s news agency the government-run school was open to boys and girls. Most of the hurt were girls, who study in the second of three sessions, according to Ms. Arian.