The U.S. Senate's decision to impose new sanctions on Iran is an "unquestionable" violation of a nuclear deal reached in 2015 between Tehran and six major powers including the United States, Iranian media quoted a senior Iranian official as saying.

Former Prime Minister of the State of Qatar Hamad bin Jassim bin Jabor Al Thani said that the “accusations about special relations with Iran and funding terrorism surprized us”.

An Iranian navy vessel conducted an "unsafe and unprofessional" interaction with US ships by pointing a laser at an accompanying Marine Corps helicopter, the US Navy said Wednesday.

Iranian Foreign Minister Mohammad Javad Zarif said on Tuesday Saudi Arabia was supporting militants inside Iran, days after hardline Sunni group Islamic State claimed attacks in Tehran.

Iran has sent four cargo planes of food to Qatar and plans to provide 100 tonnes of fruit and vegetable every day, Iranian officials said, amid concerns of shortages after Qatar's biggest suppliers severed ties with the import-dependent country.

German Chancellor Angela Merkel said on Friday she was concerned about the situation in Qatar, adding that all Gulf nations, and also Iran and Turkey, should work together to resolve the regional dispute.

Iranian authorities have arrested seven people suspected of helping militant

Iran’s Supreme Leader Ayatollah Ali Khamenei said on Friday attacks in Tehran by Islamic State that killed at least 17 people will increase hatred towards the United States and Saudi Arabia, state TV reported.

Bahrain's foreign minister, keeping up the pressure on Qatar in a deepening Arab row, reiterated on Thursday a demand that Doha distance itself from Iran and stop support for "terrorist organizations".

Iran said on Thursday that gunmen and bombers who attacked Tehran were Iranian members of Islamic State who had fought in the militants' strongholds in Syria and Iraq - deepening the regional ramifications of the assaults.

The president of the United Arab Emirates (UAE) has sent condolences to his Iranian counterpart after at least 13 people were killed in militant attacks on Iran's parliament and Ayatollah Khomeini's mausoleum in Tehran.

Bahraini King Hamad bin Isa Al Khalifa said his country had suffered from interference coming from both Qatar and Iran, which “extend several centuries.”

Al-Wefaq National Islamic Society condemned the terrorist attack that targeted the Iranian Parliament and shrine of Imam Rouhollah Khomeini in Tehran.

Saudi Arabia's foreign minister rejected an accusation by Iran's Revolutionary Guards that his country was behind twin attacks in Tehran on Wednesday that killed at least 12 people.

Iran's Revolutionary Guards say Saudi Arabia was behind twin attacks in Tehran on Wednesday that killed at least 12 people and injured 43, a statement published by the Guards said.

Qatar is talking to Iran and Turkey about securing food and water supplies to stave off possible shortages two days after its biggest suppliers, the United Arab Emirates and Saudi Arabia, cut trade and diplomatic ties, a government official said on Wednesday.

Islamic State claimed responsibility for attacks on Iran's parliament and Ayatollah Khomeini's shrine on Wednesday, the group's state news agency AMAQ said.

Attackers raided Iran’s parliament and opened fire at the Mausoleum of Ayatollah Khomeini a few kilometers south of the capital on Wednesday morning, in near simultaneous assaults that killed up to seven people, media reported.

An official at Iran Airports Company said that all flights performed by Qatari airlines will cross the Iranian airspace to travel to Africa and Europe.

The Arab world's strongest powers cut ties with Qatar on Monday over alleged support for Islamists and Iran, re-opening a festering wound just two weeks after U.S. President Donald Trump's demand for Muslim states to fight terrorism.