Tasnim � Iranian Intelligence Minister Mahmoud Alawi said the country�s intelligence and security forces would teach terrorists and their sponsors �an unforgettable lesson� after Wednesday�s attacks in Tehran.

The forces serving in the Intelligence Ministry and other Iranian security and military organizations would very soon teach an unforgettable lesson to the �mercenary terrorists and their sponsors,� Alawi said in a message on Wednesday, after two terrorist attacks in Tehran claimed 12 lives and wounded more than 40 others.

He also described the assaults in Tehran as a sign of the �bestial anger and fury� that terrorists are feeling in the face of the Iranian nation�s unity and determination and after successive victories for the Islamic Republic.

On Wednesday morning, terrorists launched simultaneous attacks on Iran�s parliament building in downtown Tehran and on the mausoleum of late founder of the Islamic Republic Imam Khomeini, south of the city.

The Daesh (ISIL) terrorist group claimed responsibility for the attacks.

Leader of the Islamic Revolution Ayatollah Seyed Ali Khamenei underlined on Wednesday that Iran will keep moving forward and the terrorist attacks will only result in stronger determination among Iranian nation.