STORY: Claimed by Islamic State, the attack on the Shi'ite Muslim shrine killed 15 worshippers, according to authorities, who say they have arrested a gunman involved in the attack.
At the Shirazi home of the killed family, where banners with photos and names of the deceased were hung up, the brother of the dead mother called for Islamic State to face punishment, saying the country must "combat terrorism".
A memorial was also set up at the Shah Cheragh, where shrine goers mourned the lives lost on Friday evening. Bullet holes could be seen in the shrine where the attack took place.
Several of those injured in the attack remained at Shahid Rajaei Hospital on Friday.