A military base deep inside Saudi Arabia appears to be testing and possibly manufacturing ballistic missiles, experts and satellite images suggest, evidence of the type of weapons programme it has long criticised its arch-rival Iran for possessing.

As well as internal pressures, Iran’s leaders have faced significant anti-government activity from ethnic minority groups, but have failed to engage, writes Brenda Shaffer.

Clouds are gathering over the outlook for the oil market, as trade tensions and rising crude supply threaten to swamp demand growth, but some of the world’s most prominent energy investors are convinced the price will return to record highs.

Israel has unveiled "half ton" of Iranian nuclear documents which it claims prove that Tehran covered up a nuclear weapons programme before signing a deal with the international community in 2015.

Donald Trump has threatened to pull out of the 2015 Iran nuclear agreement, unless it is ‘fixed’ by May 12. He would be right to follow through, according to Michael Makovsky.

Despite their difference Iran and Russia are both becoming big players in the Middle

Iran's Supreme Leader has accused his country's enemies of meddling in recent protest rallies, as the reported death toll reached 20.

French president Emmanuel Macron is using instability in the Middle East to cast himself in the role of honest broker and position France as Europe’s top player, says Maysam Behravesh.

This is Ireland’s ninth time to be involved in a play-off for the right to participate at a major tournament.

The CIA's release of documents seized during the 2011 raid that killed al Qaida leader Osama bin Laden has again raised questions about Iran's support of the extremist network leading up to the September 11 terror attacks.

Iran's supreme leader has described Donald Trump as "mentally retarded" as he urged Europe to do more to back the 2015 nuclear deal after the US president refused to re-certify the pact.

Donald Trump has renewed his threat to fully withdraw the US from the landmark Iran nuclear deal. He also held out the possibility that fixes to the accord could prevent an American pullout.

A brute force cyber attack on the UK parliament that compromised MPs' email accounts was carried out by Iran, it has emerged.

If the US president scuppers the nuclear deal, Iran, a proud, resource-rich nation, which also has a large uranium stockpile, will not capitulate, says Seyed Hossein Mousavian.

The Trump administration has slapped 18 Iranian individuals and groups with sanctions for aiding the country's non-nuclear weapons programmes.

The Trump administration has again told Congress that Iran is complying with the nuclear deal, but insisted Tehran would face consequences for breaching "the spirit" of the agreement.

More than 40 others were wounded in the attacks which have been claimed by the Islamic State.

The relationship between the US president and the Russian leader could suffer as they begin to deal with some of the more pressing issues, writes Josh Cohen.

Iran is to launch missiles later as part of a military exercise despite US sanctions.

Iran says it will deploy missiles for a military drill today, after President Donald Trump imposed new sanctions targeting Tehran's ballistic missile programme.

The US and five other world powers have approved Iran importing as much as 130 tons of uranium, Iran's English language Press TV reported.

Iran's president has said his country will not allow President-elect Donald Trump to "tear up" the country's landmark nuclear deal with world powers.

Israel’s ambassador to Ireland has said he “cannot guarantee” that Irish passports will not be used by the Israeli secret service again, after their previous use in the assassination of a Palestinian militant.

Saudi Arabia will only freeze its oil output if Iran and other major producers do so, the kingdom’s deputy crown prince said, challenging the country’s main regional rival to take an active role in stabilising the over-supplied global crude market.

The Monte Toledo oil tanker covered the uneventful voyage from Iran to Europe with a haul of one million barrels of crude in just 17 days, but its journey has been four years in the making.

Opec is very unlikely to cut output at its next meeting in June, even if prices remain extremely low, according to organisation sources and delegates, as it will be too early to say how fast Iranian output is rising.

The United States has imposed sanctions over Iran’s ballistic missile testing, even as President Barack Obama hailed the release of five Americans from Tehran’s custody and a nuclear deal he hopes will stand among his lasting foreign policy achievements.

Iran’s president has said that Saudi Arabia cannot “cover up” its crime of executing a leading Shi’ite cleric by severing diplomatic relations with the Islamic Republic.

Saudi Arabia has often counted on having the oil market’s equivalent of a nuclear option.

Saudi Arabia says it has broken off diplomatic ties with Iran, amid a row over the Saudi execution of a prominent Shi’ite Muslim cleric.

Iran has met a key requirement of a nuclear deal with six world powers by completing the transfer of most of its enriched uranium to Russia, a senior unnamed Russian diplomat has said.

Investigation had to be ended as part of internationally agreed deal

A committee of Iran’s conservative-dominated parliament gave its support to Iran’s nuclear agreement with world powers, on condition there would be no foreign inspections of military sites and no curbs on developing its missile programme.

Iran’s foreign minister said yesterday that it was too early to talk of reopening the US embassy in Tehran, as Britain restored its diplomatic mission four years after protesters ransacked the British ambassador’s residence.

Iran will remain closed to US influence and continue to oppose US policies in the Middle East after its nuclear deal with big powers, supreme leader Ayatollah Ali Khamenei said yesterday, noting either country can still block the accord.

Speculators cut bullish bets on oil to the lowest level since March because an agreement over Iran’s nuclear programme threatens to prolong a global supply glut.