The Friday event was attended by the heads of Iran’s Executive, Legislative and Judiciary Branches, President Hassan Rouhani, Parliament Speaker Ali Larijani, and Judiciary Chief Sadeq-Amoli Larijani respectively.

Also joining the ceremony were government ministers, and Ayatollah Mohammad Mohammadi-Golpayegani, the head of the office of Leader of the Islamic Revolution Ayatollah Seyyed Ali Khamenei.

Others included foreign ambassadors, and survivors of the Wednesday attacks, who were holding up pictures of the victims.

Addressing the ceremony, the parliament chief said, “Today is a hard day for the Iranian nation. Farewell to dear ones, who were sadly martyred.”

“The terrorists fell short of their [main] aim” and then started to blindly target civilians and employees, he said.

Their targeting the locations, Larijani said, indicated their concentration on the “axes of the Iranian people’s religious democracy.”

A funeral procession will also be held after the Friday Prayers in the capital.

At least 17 people were killed and more than 50 injured in Tehran on Wednesday, when gunmen attacked Iran’s Parliament (Majlis) and the Mausoleum of the late Founder of the Islamic Republic Imam Khomeini.

The ISIS Takfiri terrorist group claimed responsibility for the near-simultaneous assaults.

On Thursday, the Iranian Intelligence Ministry released the names of the five terrorists who were killed after carrying out the deadly attacks in Tehran.

Local police in Iran’s western province of Kermanshah also said two people have been arrested in connection with the double attacks, while over 90 handguns have been discovered during a security operation in Ravansar Country.