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 Arab Spring had deeply destabilised the Middle East. A new dimension was added to the existing instability on January 4, 2016, when the (Sunni) Kingdom of Saudi Arabia (KSA) severed diplomatic ties with (Shia) Iran.
Iran "has opened a new chapter" in its ties with the world, President Hassan Rouhani has said, hours after economic sanctions on Tehran were lifted.
Iran's Revolutionary Guards have released 10 US sailors held for entering its territorial waters in the Gulf, state television reported.
Saudi Arabia's execution of Shia cleric Nimr-al-Nimr, alongside 46 others, mostly al Qaeda members, has sparked a crisis with Iran.
Shia Muslims in Dhaka today protested the execution of a prominent Shia cleric carried out by the Sunni Muslim majority Saudi Arabia on January 2.
Saudi Arabia's Deputy Crown Prince Mohammed bin Salman has said a war between his country and Iran would be the beginning of a catastrophe and Riyadh would not allow it.
Iran and Saudi Arabia take further steps to sever commercial ties today, intensifying a feud between the regional rivals, as Tehran announced a ban on imports from Saudi Arabia and Saudi groups called for boycotts of Iranian products.
Saudi warplanes "deliberately" strike Iran's embassy in Yemen in an air raid that wounds staff, Tehran says as tensions between the two regional powers mount.
Bangladesh has condemned the recent attacks on the Saudi embassy in Tehran and its consulate in Mashhad.
Turkey's government urges Saudi Arabia and Iran to calm their diplomatic row, saying the dispute will only worsen regional tensions.