DUBAI, United Arab Emirates — Iran’s president, Ebrahim Raisi, the country’s foreign minister, and several other officials were found dead on Monday, hours after their helicopter crashed in a foggy, mountainous region of the country’s northwest, state press reported.

The crash comes as the Middle East remains unsettled by the Israel-Hamas war, during which Raisi, who was 63, under the Supreme Leader, Ayatollah Ali Khamenei, launched an unprecedented drone-and-missile attack on Israel just last month.

During Raisi’s term in office, Iran enriched uranium closer than ever to weapons-grade levels, further escalating tensions with the West as Tehran also supplied bomb-carrying drones to Russia for its war in Ukraine and armed militia groups across the region.

Meanwhile, Iran has faced years of mass protests against its Shiite theocracy over its ailing economy and women’s rights — making the moment that much more sensitive for Tehran and the future of the country.

Ayatollah Khamenei hours later announced Iran’s first vice president, Mohammad Mokhber, would serve as the country’s acting president until elections are held.

State TV gave no immediate cause for the crash that occurred in Iran’s East Azerbaijan province.

Among the dead was the Iranian foreign minister, Hossein Amir-Abdollahian, 60. The helicopter also carried the governor of Iran’s East Azerbaijan province, other officials, and bodyguards, the state-run IRNA news agency reported.

Early Monday morning, Turkish authorities released what they described as drone footage showing what appeared to be a fire in the wilderness that they “suspected to be wreckage of helicopter.” The coordinates listed in the footage put the fire some 12 miles south of the Azerbaijan-Iranian border on the side of a steep mountain.

Footage released by the IRNA early Monday showed what the agency described as the crash site, across a steep valley in a green mountain range. Soldiers speaking in the local Azeri language said: “There it is, we found it.”

Condolences started pouring in from neighbors and allies after Iran confirmed there were no survivors from the crash. Pakistan announced a day of mourning and the Indian prime minister, Narendra Modi, said in a post on X that his country “stands with Iran in this time of sorrow.” Leaders of Egypt and Jordan also offered condolences, as did the Syrian dictator, Bashar Al-Assad.

Azerbaijan’s president, Ilham Aliyev, said he and his government were “deeply shocked” — Raisi was returning on Sunday after traveling to Iran’s border with Azerbaijan to inaugurate a dam with Mr. Aliyev when the crash happened.

The Turkish president, Recep Tayyip Erdogan, conveyed his condolences. President Putin, in a statement released by the Kremlin, described Raisi “as a true friend of Russia.”

Ayatollah Khamenei, who had himself urged the public to pray Sunday night, stressed the business of Iran’s government would continue no matter what.

Under the Iranian constitution, Iran’s vice first president takes over if the president dies, with the ayatollah’s assent, and a new presidential election would be called within 50 days.

The Supreme Leaders’s condolence message Monday over Raisi’s death, declared five days of public mourning and acknowledged Mr. Mokhber had taken the role of acting president.

Mr. Mokhber had already begun receiving calls from officials and foreign governments in Raisi’s absence, state media reported.

A hard-liner who formerly led the country’s judiciary, Raisi was viewed as a protégé of Ayatollah Khamenei and some analysts had suggested he could replace the 85-year-old leader after the cleric’s death or resignation.

With Raisi’s death, the only other person so far suggested has been Mojtaba Khameini, the 55-year-old son to the supreme leader. However, some have raised concerns over the position being taken only for the third time since 1979 to a family member, particularly after the Islamic Revolution overthrew the hereditary Pahlavi monarchy of the shah.

Raisi won Iran’s 2021 presidential election, a vote that saw the lowest turnout in the Islamic Republic’s history. Raisi is sanctioned by America in part over his involvement in the mass execution of thousands of political prisoners in 1988 at the end of the bloody Iran-Iraq war.

Under Raisi, Iran now enriches uranium at nearly weapons-grade levels and hampers international inspections. Iran has armed Russia in its war on Ukraine, as well as launched a massive drone-and-missile attack on Israel amid its war against Hamas in the Gaza Strip. It also has continued arming proxy groups in the Mideast, like Yemen’s Houthi rebels and Lebanon’s Hezbollah.

Meanwhile, mass protests in the country have raged for years. The most recent involved the 2022 death of a woman who had been earlier detained over allegedly not wearing a hijab, or headscarf, to the liking of authorities, Mahsa Amini. The monthslong security crackdown that followed the demonstrations killed more than 500 people and saw over 22,000 detained.

In March, a United Nations investigative panel found that Iran was responsible for the “physical violence” that led to Amini’s death.

Raisi is the second Iranian president to die in office. In 1981, a bomb blast killed President Mohammad Ali Rajai in the chaotic days after the country’s Islamic Revolution.