FNA- Iran's police chief said the twin terrorist attacks on the Iranian parliament and Imam Khomeini's shrine in early June has alarmed every one in the country.

"The law enforcement and security forces took powerful action in the parliament terrorist incident and killed the terrorists," Law Enforcement Commander Brigadier General Hossein Ashtari said during a ceremony to intorduce the new police chief of the capital, Tehran, on Wednesday.

"Yet, the terrorist attack on the parliament rang the bell for all of us," he added.

Three unknown male assailants fired several rounds at the guards protecting the parliament building in Tehran on June 7. The assailants opened their way into the parliament's administrative building while shooting at the guards.

A similar attack took place at the holy shrine of the late founder of the Islamic Republic, Imam Khomeini, parallel with the parliament attack.

18 people, including the parliament's guards, were killed and 52 others were wounded in the twin attacks claimed by the ISIL.