In his Thursday statement, Qassemi condemned the attack and expressed sympathy with the Afghan nation and government and the bereaved families of the victims.
A suicide bomber killed nine people at a political gathering in Kabul in an attack claimed by ISIS.
Interior Ministry spokesman Najib Danish said the attacker detonated his payload at the entrance to a wedding hall where the event was being held, killing seven police and two civilians, and wounding another nine people.
ISIS claimed the attack in a statement carried by its Aamaq news agency. The Taliban denied involvement.
Both the Taliban and the ISIS affiliate, which is largely made up of disgruntled former Taliban fighters, are at war with the government and have carried out major attacks in Afghanistan within the past years.