A spokesman for the Kabul police commandment Hashmat Stanikzai said at least seven people including a policeman were killed and nine others were wounded.
Stanikzai further added that two policemen were among those wounded in the attack.
Acccording to Stanikzai, the incident took place at around 11:30 am local time after a suicide bomber detonated his explosives near the entrance of Loya Jirga camp where a large gathering was underway.
No individual or group has so far claimed responsiblity behind the incident.
This comes as the ministry of interior spokesman Najib Danish had ealier said at least six people were killed and six others were wounded in the explosion.
However, another security official says at least 14 people were killed and 17 others were wounded in the attack.
The incident took place shortly after the religious scholars ended their gathering and were leaving the camp where they issued a Fatwa against the ongoing conflict.