MNA � One of the perpetrators of the terrorist attack on Imam Khomeini Shrine has been arrested alive and is in custody of intelligence forces, Iran�s parliament security chief�Alaeddin Boroujerdi�said Wednesday.

Chairman of the Iranian Parliament's National Security and Foreign Policy Committee Alaeddin Boroujerdi�made the remark in a televised interview with IRIB last night, adding �six assailants on Imam Khomeini Shrine and parliament were killed and one female terrorist was arrested at the shrine and is currently being interrogated by intelligence forces.�

He went on to add, �ISIL had sent dozens of terrorist cells to Iran these past few years, but our intelligence and operational bodies had their every move from Syria�s Raqqa or Iraq�s Mosul under constant surveillance.�

�Saudi Arabia�s silence on Tehran�s terrorist attacks is questionable,� he said.

Boroujerdi further stressed that the attacks in Tehran proved the necessity of combating terrorism hundreds of kilometers away from Iranian borders.

In the same program on IRIB, the secretary deputy of Iran Supreme National Security Council, Reza Seifollahi, said the assailants of the twin attacks against Iran's parliament and Imam Khomeini Shrine in Tehran on Wednesday were from different parts of Iran who had joined�ISIL and been cooperating with them in the areas under the control of this group in Syria and Iraq.

�ISIL finds the advisory, military and intelligence assistance of the Islamic Republic highly effective for the elimination of the terrorist group. That is why these people, following the recent losses of the ISIL in Syria and Iraq, had returned to their country�to commit such treachery against Iranian people.�

Seifollahi further stressed that there is no cause for concern, adding �intelligence and security bodies are in constant effort to sustain Iran�s national security at the country�s borders and even beyond borders.�

Heshmatollah Falahatpishe, member of National Security and Foreign Policy Committee, also said that 98 percent of ISIL terrorist plots against Iran has been neutralized, adding �the neutralization process of ISIL terrorist plots in Iran is several orders of magnitude more successful�than similar measures in other countries in the world.�

Iran�s parliament and mausoleum of Ayatollah Khomeini in Tehran were hit in near-simultaneous attacks that have killed 13 people and wounding 52 according to the head of Iran's Emergency Medical Services. Terrorist group ISIL has claimed responsibility for both attacks. A third attack had been foiled by security forces before being carried out.