TEHRAN - A second person who was accomplice in the terrorist attack on the Shah-e Cheragh shrine in Shiraz was detained on Sunday night, Intelligence Minister Esmaeil Khatibzadeh announced on Monday.

“Last night we succeeded to identify and arrest the second person involved in the Shah-e Cheragh terrorist incident,” Khatibzadeh said in a national congress of the Civil Defense Organization.

Hours later, the Intelligence Ministry also issued a statement stating that in a complicated operation six more persons who “provided support for the terrorist criminal team" had been apprehended.

A terrorist attacked pilgrims in the Shah-e Cheragh shrine on October 26.  The attack took place at evening prayers.

The Daesh Takfiri terrorist group claimed responsibility for the savage act.

The heavily-armed terrorist killed 15 pilgrims, including a woman and three schoolchildren, and wounded at least 30 others.

According to police chief of Fars province, the gunman started mowing down at everyone within the shrine. Security personnel injured the offender and then arrested him. Later, he perished from his wounds.

Since the attacker was killed the arrest of his accomplice on Sunday night can provide clues to security and intelligence officials.

Iran’s top security and political officials have said those behind the vicious attack will not go unpunished.