Sharmahd, a German citizen of Iranian descent and a US resident, was seized by Iranian authorities in 2020 while travelling through the United Arab Emirates, according to his family.
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.
A bleak picture confronts opponents of Iran's clerical authorities two years after a protest movement erupted that they hoped would be a turning point in the four-and-a-half-decade history of the Islamic republic.
In response, Iran's mission to the United Nations denied the country's role in the hack and challenged Washington to release evidence for the claim.
OpenAI recently announced that it has shut down several Iranian accounts that were using ChatGPT to create deceptive content regarding the US presidential election.
Bagheri accused Israel of wanting "to expand tension, war and conflict to other countries," while asserting it was not in a position to fight Iran.
Should we believe that the same man who didn’t believe in women’s right to freedom of choice is now a changed “reformist”?
Ahmadinejad, 67, held the post for two straight terms from 2005 to 2013, a period marked by a standoff with the West especially over Iran's nuclear programme and his incendiary remarks on Israel.
Hasina conveyed her condolence in a letter to interim president of Islamic Republic of Iran Mohammad Mokhber
Iranian President Ebrahim Raisi, a hardliner long seen as a potential successor to Supreme Leader Ayatollah Ali Khamenei, was killed in a helicopter crash in mountainous terrain near the Azerbaijan border, officials and state media said on Monday
Mokhber became first vice president in 2021 when Raisi was elected president
President Raisi, the foreign minister and all the passengers in the helicopter were killed in the crash, senior Iranian official told Reuters