"Half of the mosque was full of worshipers - women upstairs and men downstairs, hundreds of men and women", he said, pacing barefoot. Friday is the Muslim sabbath when worshippers usually attend prayers at the mosque.
"We have ten civilians martyred and over 40 wounded".
Danish said police rescued more than 100 worshippers who were caught in the fight between security forces and the attackers.
He vowed that Afghanistan would stay united in the face of these attacks and that terrorism would be defeated.
After the suicide blast, gunmen attacked the mosque in Qala-e-Najarha area in Kabul's PD11 on Friday afternoon, the Ministry of Interior confirmed. Worshippers, wounded and dead were being evacuated from the mosque.
The Islamic State, though its media agency Amaq, claimed responsibility for the attack.
The IS group also claimed responsibility for mosque attacks in Kabul and in the western Herat province.
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In the claim, IS says two of its fighters, seeking martyrdom, carried out the assault.
Many explosions were later heard from the area during the clearance operation by the Crisis Response Unit of the Afghan National Police, Tolo News reported.
The attack was the latest by IS to hit the Afghan capital.
The assault underscores spiralling insecurity in Afghanistan as a resurgent Taliban steps up offensives across the country, while ISIL, known for carrying out sectarian attacks, expands its Afghan footprint.
According to him, at least 12 people were killed and 38 others were wounded in the attack.
People gathered outside the mosque were trying to call women and children trapped inside but their mobile phones were not responding, an AFP reporter at the scene said.
The mosque is now surrounded by Jamil, said Afghan security forces but they have not closed in on the building in an attempt to prevent further injury or death. Police have not provided any immediate information on any casualties. Security forces have been unable to advance fearing even greater casualties.