Bahram Qassemi strongly denounced the attack and expressed sympathy with the government and people of Afghanistan and the families of the victims.
He deplored the fact that "mercenary terrorists” even disregarded the sanctity of the month of Ramadan and attacked the house of God in the name of Islam.
On Thursday night, an assailant detonated his explosives when he was prevented from entering the al-Zahra Mosque in western Kabul, prompting an exchange of fire between the police and other attackers.
The Daesh Takfiri terrorist group claimed responsibility for the attack, which according to the police, also injured five others.
Daesh, which is mainly active in Iraq and Syria, has been suffering heavy defeats at the hands of national armies and allied forces in the two Arab countries. It has recently gained a foothold in Afghanistan, mostly in Nangarhar Province. But it has managed to stage a handful of attacks beyond the eastern province.