Terrorist operation in Iran's parliament ended, IRNA reported.

In an apparently coordinated attempt, two terrorist groups attacked mausoleum of the late Imam Khomeini, southern Tehran, and the Iranian Parliament (Majlis) on Wednesday morning, killing 12 people and injuring 42 more.

One of the terrorist was gunned down by the security forces and another attacker, reportedly a woman, blew herself up outside the Imam Khomeini shrine.

The ISIS terrorist group has claimed responsibility for the fatal attacks in Tehran. 

The terrorists entered the Parliament building while they had dressed as women, said a security official.

Parliament operation ended by security forces who killed three of the terrorists, one of them had detonated himself before.