Saudi Arabia prime suspect behind recent terrorist attacks in Tehran: Iranian official

Ramadan toll shows Islamic State in pitched recruiting race

Implications of the ISIS Attacks in Tehran

Ayatollah Ali Khamenei blamed USA for the creation of ISIS and also said that it's fight against Islamic State is a lie.

It comes as relations between Tehran and Washington have grown increasingly strained, most recently overshadowed by a string of allegations made by a number of high-ranking Iranian officials claiming the USA had forged an alliance with Islamic State (IS, formerly ISIS/ISIL).

The hearing focused on where the United States' and Saudi Arabia's interests align in their fight against the spread of terrorism in the Middle East and how the United States should conduct itself with regard to the Saudi Arabia's local SaudArabian influence.

The remarks by Zarif partially referred to the comments made by Saudi Arabia's deputy crown prince, Mohammed bin Salman Al-Saud, in May, who said Riyadh would bring "the battle" into Iran. "America's claim of fighting against Islamic State is a lie", said Khamenei, the hardline Iranian leader known for his sharp anti-American rhetoric, addressing senior Iranian officials on Monday. Khamenei said Iran had no intention of normalizing ties with the United States.

In a series of Twitter posts responding to Donald Trump's criticism of the country for "sponsoring terrorism", Khamenei wrote: "That US arms a terrorist group is what causes instability".

Trump has previously said that the 2015 nuclear deal with Iran is a "disaster" and the "worst deal ever negotiated".

Iran and Saudi Arabia accuse each other of subverting regional security and support opposite sides in conflicts including those in Syria, Yemen and Iraq.

Following Iran's Islamic revolution in 1979, both countries discontinued diplomatic relations.

On the future of economic relationship between the two countries, the Birmingham fellow predicted it would be limited in near future.

World leaders condemned the attacks on Iran, however neither Saudi Arabia nor the United Sates did so.

Zarif told the forum that recent Saudi officials' remarks against Iran are a "direct threat and very unsafe provocation". "Most of our problems with them can not be resolved".

Accordingly, he criticized certain individuals for putting a religious and ethnic spin on the recent terror attacks in Tehran and seeking to link the terrorists with certain religious or ethnic communities.

Iran's Revolutionary Guard quickly, but with deliberate vagueness, incriminated Saudi Arabia and the United States.

Cosby jury deliberating, no new questions
Gareth Southgate: 'We lacked composure'