The suspects were identified as Abdullah, alias Hamza, Waqar, Waseem, Naveed and Mudassir, he added.
The official said that jihadi lliterature, weapons, hand grenades and bullets were recovered from their hideout.
The suspects would indoctrinate people over social media and give them various offers to join the group, he added.
The ISIS Saturday claimed responsibility for a suicide attack that killed 21 people and wounded more than 50 others in Quetta, the provincial capital of restive Balochistan province, in an attack believed to be targeting the minority Hazara Shia community.
The Pakistani officials have repeatedly denied presence of the ISIS in the country, but the Middle Eastern terror group has claimed a number of attacks in the past.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)