At least 15 people were killed and 40 others were injured in the evening of October 26 in a terrorist attack at the Shah Cheragh Shrine in the city of Shiraz, southern Iran, according to state-run media and Iranian officials.

Press TV says two children were among the victims.

Iranian security forces have reportedly arrested two of the suspected attackers, and a manhunt is underway to capture a third, state news said.

CNN says the terror group ISIS has claimed responsibility for the attack, releasing a statement through its affiliated Amaq news agency that said one of its members had “targeted groups of Sunni refusal infidels inside the shrine with his machine gun, causing the death of tens of them.”

According to CNN, Nour News Agency, which is affiliated with Iran’s top security body, said the suspects were foreign nationals.