Jaishankar was in Tehran last month and was one of the first foreign leaders to have met with President-elect Ebrahim Raisi ahead of his swearing-in on August 5.
While landline service continues, NetBlocks warned its analysis and user reports were 'consistent with a regional internet shutdown intended to control protests'
The trip by the new domestically built destroyer Sahand and the intelligence-gathering vessel Makran comes amid US media reports, citing anonymous American officials, saying the ships were bound for Venezuela.
In a meeting between Iran's President Hassan Rouhani and the emir of Qatar, both sides agreed de-escalation is the "only solution" to the regional crisis.
The responsible parties would be referred to a judicial department within the military and held accountable, the army said.
"If America has committed a crime... it should know that it will receive a decisive response," Rouhani said in a televised address, hours after Iran fired missiles at Iraqi bases housing US troops.
Iranians clutching "Down with USA" signs and portraits of Qasem Soleimani massed as supreme leader Ayatollah Ali Khamenei presided over prayers for the slain head of the Revolutionary Guards' Quds Force.
The nuclear accord between Iran and the United Nations Security Council's five permanent members -- Britain, China, France, Russia and the United States -- plus Germany was agreed in 2015.
US President Donald Trump has been actively putting out tweets, issuing warnings to Tehran, two days after a drone strike killed a top Iranian general in Iraq.
"Following the martyrdom of the glorious general haj Qasem Soleimani, I name Brigadier General Esmail Qaani as the commander of the Quds Force of the Islamic Revolutionary Guard Corps," Ayatollah Ali Khamenei said in a statement posted on his official website.
"US citizens should depart via airline while possible, and failing that, to other countries via land," the embassy said in a statement.
In a speech aired on state TV, Rouhani said the country's economy had stabilised despite punishing US measures against its senior leaders, banking and finance sectors.
Prime Minister Narendra Modi met Iranian president Hassan Rouhani on the sidelines of the high-level 74th Session of the General Assembly on Thursday amidst fresh tensions between Iran and the United States.
Tehran and Washington have been at loggerheads since May last year when US President Donald Trump unilaterally withdrew from the nuclear accord and began reimposing crippling sanctions.
The planes have arrived at an American air base in Qatar for their deployment in the Persian Gulf to counter unspecified threats from Iran
On November 5, the second package of US sanctions, re-introduced after Washington's withdrawal from the Joint Comprehensive Plan of Action (JCPOA)
Iran summoned diplomats from Denmark, the Netherlands and Britain over their hosting of some members of the terrorist group
Iranians are already seeing the effects of the sanctions, with Iran's rial currency losing around half its value since Trump announced the US would withdraw from the 2015 nuclear accord.
Railway authorities demolish illegal structures for the expansion of a platform at the Varanasi Cantt Station in Varanasi.PTI Photo
Chief Minister Special Vigilance Cell arrested people in connection with cash for job scam in Assam Power Distribution Company Limited (APDCL) in Guwahati.PTI Photo
BJP President J P Nadda greets party veteran Vijay Kumar Malhotra during a programme on the occasion of Bharatiya Jana Sangh leader Deendayal Upadhyaya's birth anniversary, at the BJP office in New Delhi.PTI Photo
HR College youth wing students clean plastic waste during the beach clean up drive at Chowpaty in Mumbai.PTI Photo
Principal District and Sessions Judge Swarana Kanta Sharma talks with a Delhi Police officer during her visit to the Rohini Court, a day after the shooting incident, in New Delhi.PTI Photo
Opposition parties unite for implementation of a long-standing demand. Will the Modi Government bite the bullet?
There is no need to contextualise Hathras. It is a standalone story. A warning, a trigger, a tragedy.
A Dalit Sikh CM from the neglected Puad region is a smart move, queering the pitch for the grand old party’s rivals.
Virat Kohli will step down as T20 captain of India and RCB but that will not take away the fact that he remains a unique leader
With all foreign soldiers out of Afghanistan, the Taliban is now in a position to do pretty much what it wants.
It can be a crucial stepping stone to develop young minds to appreciate the importance of practising honesty throughout their academic journey and lay the foundations for successful professional careers.
One can be pro-religion, but against coerced religion; one can be pro-vaccines, but against coercion and mandates