No fewer than 25 people, many believed to be students, were killed when a suicide blast ripped through a school in a Shiite area of Kabul Wednesday.
Officials said the attacker appeared to target the Mawoud education centre, which specialises in preparing students for university exams in the western part of the city.
“We can confirm the attack was caused by a suicide bomber on foot. The bomber detonated himself inside the education centre,” police spokesman Hashmat Stanikzai said.
The spokesmen for the interior ministry and health ministries both confirmed that at least 25 people were killed and 35 injured.
One witness, another student named Ali Ahmad, said as many as 100 students may have been inside when the bomber struck, AFP writes.
There was no immediate claim of responsibility for the attack, which was swiftly condemned by President Ashraf Ghani in a statement.
Both the Taliban and the Islamic State group (IS) have carried out devastating, high-profile attacks in war-weary Kabul in recent months, but the Taliban quickly denied they were involved.
The latest blast comes as Afghanistan experiences a recent upsurge in militant violence and terrorist attacks.
The upsurge in violence comes as US and Afghan forces intensify ground and air offensives against the Islamic State (IS), and the Taliban step up their turf war with the group.