Iran arrests two suspects linked to attacks in Tehran

On Tehran's enmity with Washington, the Iranian leader said "Some of the problems with the United States are essentially unresolvable as the US's problem with us has nothing to do with nuclear energy or human rights, their problem is with the principle of the Islamic Republic". He said it was too soon to say if Saudi Arabia was responsible. All five perpetrators were Iranian nationals.

Jaish-ul Adl (Army of Justice), which Tehran accuses of links with al-Qaida, has carried out several armed attacks inside Iranian territory in recent years.

But the new occupant in the White House, Donald Trump, has taken a much more hostile and harder stance toward Iran compared to his predecessors.

Trump issued a statement after the attack offering condolences for the victims, while also taking a swipe at Iran. ISIS had claimed responsibility for the violence at the parliament and the mausoleum of Ayatollah Ruhollah Khomeini.

The Sunni militants of IS consider Shiite Iranians to be apostates, and Tehran is deeply involved in fighting the group in both Syria and Iraq.

IS on Thursday released a video of the five attackers before the assault, via its Amaq propaganda agency.

Members of Iranian security forces respond to an attack at parliament in Teheran on June 7.

During the funeral, Parliament Speaker Ali Larijani called the US the "international" version of the Islamic State group and said Washington had exchanged democracy for money, a reference to a recent huge arms deal between the USA and Saudi Arabia. Now Iranians are worrying about how many others are out there, planning similar assaults.

But Intelligence Minister Mahmoud Alavi has said "we still can not judge that Saudi Arabia has had a role in this terrorist incident".

The Interior Ministry in a statement increased the number of wounded to 52. Their names included Abu Jihad, Qayyum, Fereydoun, Seryas and Ramin.

The announcement reassures that the other elements of ISIL terrorist group related to Wednesday attack were identified and arrested before managing to do anything.

The funerals for those killed began on Friday morning in Tehran with a ceremony in parliament, with President Hassan Rouhani in attendance.

Mourners gathered outside the parliament complex Friday to watch the funeral procession.