At least one person has been killed in what is believed to be a co-ordinated terror attack across the Iranian capital of Tehran.
MPs insisde the Iranian Parliament building are believed to have been taken hostage, while gunmen also targeted a metro station and a mausoleum.
Initial reports from local news agencies say one person has been killed, possibly a guard of a parliament building.
Dozens more are believed to have been injured.
Iranian news agencies, Fars and Meher, claim: "A person entered Iranian Parliament today and started shooting at the guards.
"He shot one of the guards in the leg and ran away."
It is believed multiple attackers stormed the parliament and took hostages inside, closing all doors and gates to prevent MPs from leaving.
According to Fars agency, one of the shooters attempted to escape the building but was captured.
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Iran's IRIB news agency quoted an MP as saying there were a number of attackers at the parliament building, armed with AK-47 rifles.
"There were three attackers armed with two Kalashnikov rifles and one colt pistol," MP Elyas Hazrati was quoted as saying.
The semi-official Tasnim news agency reported that along with a guard's injuries, two members of the public were also caught up in the shooting.
Unconfirmed reports also say eight people have been injured inside Ayatollah Khomeini's mausoleum.
It is believed an explosive vest was also found in the holy mausoleum, but has now been neautralised.
The mausoleum is located several kilometres to the south of parliament, but happened at the same time and is believed to have been co-ordinated.
The identity and the motivation of all assailants is still unclear.
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A witness told Reuters that security forces had massed inside and outside parliament.
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