Biden was asked on Wednesday whether he would support strikes against Iranian nuclear sites and the US president told reporters: "The answer is no."
Ayatollah Ali Khamenei's address in Tehran followed Iran's second-ever direct attack on Israel. It was also the first since exchanges of fire between Tehran-backed Hezbollah fighters and Israeli troops escalated into full-blown war in Lebanon.
Biden added that the Israelis "have not concluded how they're, what they're going to do" in retaliation for a huge ballistic missile attack by Iran on Israel on Tuesday.
As Israel weighs its options after its arch-foe Iran launched its largest ever assault on Tuesday, Biden was asked whether he would support Israel striking Iran's oil facilities.
All sides are aware that any retaliatory strike against Iran's nuclear or oil installations would send the Middle East spiralling even more towards chaos, but Israel seems not to have made a decision yet.
"Our action is concluded unless the Israeli regime decides to invite further retaliation," Iranian foreign minister said in a post on X early on Wednesday.
Iran rejected accusations that it is trying to kill Trump earlier this summer, shortly after a gunman opened fire at a rally in Pennsylvania, killing one person and wounding the presidential candidate.
One of the security officials said a large-scale operation is underway by the IRGC to inspect all devices, not just communication equipment. He said most of these devices were either homemade or imported from China and Russia.
Nasrallah and Hezbollah have thrived with an image of invincibility after confronting Israel in 2006.
The crush and stampede that struck the hajj last month in Saudi Arabia killed at least 2,177 pilgrims, a new Associated Press tally showed on Monday.
The United States and Europe begin preparing to lift the trade sanctions that have hobbled the Iranian economy as a historic nuclear deal came into effect.
Iran's parliament approves a historic nuclear deal with world powers on Tuesday, effectively ending debate among lawmakers over the agreement and paving the way for its formal implementation.
Saudi Prince Turki al-Faisal rejects idea of sharing administration of Hajj with other Muslim nations, saying Riyadh considers it "a matter of sovereignty" and a "privilege."
Iran says number of its citizens who died in the Hajj stampeded in Saudi Arabia last week reaches 464 - nearly double the previous toll.
US President Barack Obama has said defeating Islamic State in Syria would only be possible if President Bashar al-Assad stepped down.
Violation of the pilgrims’ grouping regulations by some 300 Iranian pilgrims resulted in the stampede in Mina which killed 769 Hajjis and injured 934, Asharq Al-Awsat daily reports.
Iran demands an apology from Saudi Arabia over the deaths of 769 people at the hajj pilgrimage, accusing its rival of seeking to evade blame.
The death toll in a crush at the annual hajj pilgrimage outside Mecca rises to 769, Saudi Arabia said as arch-rival Iran said Saudi officials should be tried in an international court for what it called a crime.
Iran has led growing criticism of Saudi Arabia after at least 717 people died and 863 were injured in a stampede near the holy city of Mecca on Thursday.