TEHRAN – Iranian authorities have arrested eight people suspected of helping militants involved in this week’s attacks in the capital Tehran, the state-run IRNA news agency reported Saturday.

Islamic State claimed responsibility for the suicide bombings and gun attacks on Iran’s parliament and the shrine of Ayatollah Ruhollah Khomeini that killed 17 people on Wednesday.

17 dead in ISIS attacks on Iran’s Parliament, Imam Khomeini Mausoleum

Two guards, 10 government staffers and five civilians were among the dead while 52 people were wounded, according to the Interior Ministry.

Ahmad Fazelian, chief justice of Alborz province west of Tehran, was quoted in a report as saying: “These agents who were supporters of the two terrorist groups, and had full coordination with them, were arrested and they were delivered to Tehran’s judicial and security authorities.”

Meanwhile, Iran police chief Gen Hossein Ashtari said several people with connections to the attackers were arrested around the capital area.

On Thursday, Iranian authorities said the assailants were Iranian nationals and that they had arrested six suspects, including one woman, since the attack Wednesday in Tehran.

On Friday, the Intelligence Ministry announced that it had detained 41 suspects in Tehran and the western Kurdish provinces. It called the detainees “elements of the Wahhabi IS group,” and said they were involved in operations, communication and logistics for the local Islamic State group cell.