Three gunmen attacked the Imam Khomeini Mausoleum in Tehran, opening fire on people inside and wounding a number of them.
The report said one of the assailants has been killed, another has blown himself up and a third one has been injured.
Informed sources say a suicide bomber’s explosive vest has also been discovered and deactivated in the vicinity of the mausoleum.
Separately, at least four gunmen have reportedly intruded into the premises of the Majlis, opening fire on the security guards there.
The assault forced a lockdown on the legislature.
Tehran MP Elias Hazrati has said that the assailants were armed with two Kalashnikovs and a handgun.
According to lawmaker Mehdi Kiaee, the situation is under control inside the parliament, while security forces are working to restore calm there.
As seen in the footage, Anti-Terror Special Forces have been deployed to the Majlis.
Another lawmaker said that all the parliament doors are shut and one of the assailants has been surrounded by security guards.
The Daesh Takfiri terrorist group has claimed responsibility for the attacks.
A dozen people have been killed in Wednesday's attacks while another 42 have been injured and admitted to 3 hospitals to receive treatment.