At least 19 people were killed and many others injured on Friday in a powerful explosion at an education centre in the Afghan capital, BBC reported.
The blast took place at the Kaaj education centre in the Dashte Barchi area in the west of the city when students were seated during a practice university exam, officials said.
Many of those living in the area are from the Hazara minority, which has been targeted in past attacks. No group has claimed responsibility.
The Taliban’s Interior Ministry spokesman said security teams were at the site.
Abdul Nafy Takor said attacking civilian targets “proves the enemy’s inhuman cruelty and lack of moral standards”.
The Taliban returned to power in Afghanistan last August and the group says it is attempting to restore stability.
However attacks by rival Islamists the Islamic State group have continued.