General Joseph Dunford will head to the US Capitol to apprise lawmakers from both chambers on the latest developments, an official says.
There are no reports of any casualties or arrests.
US acting Ambassador Jonathan Cohen warned Iran's activities were destabilising the entire Middle East and risk triggering an arms race.
UK-Iranian citizen Nazanin Zaghari-Ratcliffe was sentenced to five years in prison in September 2016 for alleged sedition.
Nelly Erin-Cambervelle was arrested on the grounds of having signed an illegal contract and carrying out a non-authorised trip.
The most poisoning cases were reported in Alborz province north of Tehran and Hormozgan on the south coast.
Iran won a shock victory last week when the ICJ ruled that the US must lift sanctions against Tehran targeting humanitarian goods like food and medicine.
Counterterrorism strategy documents outline a US administration's blueprint for tackling the threat of extremism – from military action to intelligence operations to cooperating with partners and allies and the use of sanctions and other financial tools.
Netanyahu says Iran has a secret atomic warehouse in Tehran which he urges the UN atomic agency to inspect.
UAE Minister of State for Foreign Affairs Anwar Gargash is concerned by the public differences between the remaining European signatories to the accord.
Four assailants fired on a viewing stand in Ahvaz where Iranian officials had gathered to watch an annual event marking the start of the Islamic Republic's 1980-88 war with Iraq.
The subject matter makes it 'a caustic film' as regards its portrayal of life in Iran.
Since Donald Trump took over the White House in early 2017, Washington has set Iran in its sights, accusing it of seeking to destabilise the Middle East.
For five days last week protesters had flooded the streets, clashing with security forces and torching the provincial headquarters, the Iranian consulate and the offices of armed groups.
On Friday morning, Russian air raids pounded rebel positions in the southwest of Idlib province, the Syrian Observatory for Human Rights said.
Saudi Arabia and the UAE have backed Trump’s decision to reimpose sanctions on Tehran, reflecting the wealthy oil exporters' concern about Iran’s ballistic missile programme and support for militant groups.
Britain and other European signatories are trying to keep the nuclear deal alive, despite Trump's reimposition of sanctions on Tehran.
The agreement, reached after years of painstaking negotiations, limited Iran's nuclear development programmes in exchange for an easing of sanctions.
US President Donald Trump withdrew in May from a deal that had lifted sanctions on Tehran in return for curbs on its nuclear programme.
The lawsuit filed with the ICJ, also known as the World Court, says the US sanctions violate terms of a little-known 1955 friendship treaty between the two countries.
A fourth-generation fighter, the jet has advanced avionics and multi-purpose radar, according to the Tasnim news agency.
European states have been trying to ensure Iran gets enough economic benefits to persuade it to stay in the deal since the US withdrew from the deal, which Trump said was deeply flawed.
The ballistic missile was fired from the northern Yemeni province of Amran towards the southern Saudi city of Jizan, said a coalition statement.
The return of sanctions has increased tensions in Iran - days of protests and strikes in multiple towns and cities over water shortages, high prices and anger at the political system.