DUBAI, United Arab Emirates — Reformist candidate Masoud Pezeshkian won Iran’s runoff presidential election Saturday, besting hard-liner Saeed Jalili by promising to reach out to the West and ease enforcement on the country’s mandatory headscarf law after years of sanctions and protests squeezing the Islamic Republic.

Pezeshkian promised no radical changes to Iran’s Shiite theocracy in his campaign and long has held Supreme Leader Ayatollah Ali Khamenei as the final arbiter of all matters of state in the country. But even Pezeshkian’s modest aims will be challenged by an Iranian government still largely held by hard-liners, the ongoing Israel-Hamas war in the Gaza Strip and Western fears over Tehran enriching uranium to near-weapons-grade levels.

A vote count offered by authorities put Pezeshkian as the winner with 16.3 million votes to Jalili’s 13.5 million in Friday’s election. Overall, Iran's Interior Ministry said 30 million people voted in an election held without internationally recognized monitors.

Supporters of Pezeshkian, a heart surgeon and longtime lawmaker, entered the streets of Tehran and other cities before dawn to celebrate as his lead grew over Jalili, a hard-line former nuclear negotiator.

“Dear people of Iran, the elections are over and this is just the beginning of our cooperation,” Pezeshkian wrote on the social platform X, still banned in Iran. “The difficult path ahead will not be smooth except with your companionship, empathy and trust. I extend my hand to you and I swear on my honor that I will not leave you alone on this path. Do not leave me alone.”

Pezeshkian's win still sees Iran at a delicate moment, with tensions high in the Mideast over the Israel-Hamas war, Iran's advancing nuclear program, and a looming election in the United States that could put any chance of a detente between Tehran and Washington at risk. Pezeshkian's victory also wasn't a rout of Jalili, meaning he'll have to carefully navigate Iran's internal politics as the doctor has never held a sensitive, high-level security post.

The first round of voting June 28 saw the lowest turnout in the history of the Islamic Republic since the 1979 Islamic Revolution. Iranian officials have long pointed to turnout as a sign of support for the country's Shiite theocracy, which has been under strain after years of sanctions crushing Iran's economy, mass demonstrations and intense crackdowns on all dissent.

Government officials up to Khameni, the supreme leader, predicted higher turnout as voting got underway, with state television airing images of modest lines at some polling centers. However, online videos purported to show some polls empty while a survey of several dozen sites in Tehran saw light traffic and a heavy security presence on the streets.

Authorities put turnout in Friday's vote at 49.6%, still historically low for an Iranian presidential election. They counted 607,575 voided votes — which often are a sign of protest by those who feel obligated to cast a ballot but reject both candidates.

“I don’t expect anything from him — I am happy that the vote put the brake on hard-liners," said bank employee Fatemeh Babaei, who voted for Pezeshkian. "I hope Pezeshkian can return administration to a way in which all people can feel there is a tomorrow.”

Taher Khalili, a Kurdish-origin Iranian who runs a small tailor shop in Tehran, offered another reason to be hopeful while handing out candy to passersby.

“In the end, someone from my hometown and the west of Iran came to power,” Khalili said. "I hope he will make economy better for small businesses.”

Pezeshkian, who speaks Azeri, Farsi and Kurdish, campaigned on outreach to Iran's many ethnicities. He represents the first president from western Iran in decades — something people hope will aid the county as those in the western part are considered more tolerant because of the ethnic and religious diversity in their area.

The election came amid heightened regional tensions. In April, Iran launched its first-ever direct attack on Israel over the war in Gaza, while militia groups armed by Tehran — such as the Lebanese Hezbollah and Yemen’s Houthi rebels — are engaged in the fighting and have escalated their attacks.

Iran is also enriching uranium at near weapons-grade levels and maintains a stockpile large enough to build several nuclear weapons, should it choose to do so. And while Khamenei remains the final decision-maker on matters of state, whichever man ends up winning the presidency could bend the country’s foreign policy toward either confrontation or collaboration with the West.

Crown Prince Mohammed bin Salman of Saudi Arabia, which has reached a detente with Iran, sent his congratulations to Pezeshkian that stressed his “keenness to develop and deepen the relations that bring our two countries and peoples together.” Russian President Vladimir Putin, who has relied on Iranian-made drones in his war on Ukraine, similarly congratulated Pezeshkian.

The United States on Saturday criticized Iran’s presidential election as neither free nor fair, saying it likely would not change the Islamic Republic’s stance on human rights.

Responding to a query from The Associated Press, the State Department said it would continue to use diplomacy with Tehran “when it advances American interests.”

“The elections in Iran were not free or fair. As a result, a significant number of Iranians chose not to participate at all,” the State Department said. “We have no expectation these elections will lead to fundamental change in Iran’s direction or more respect for the human rights of its citizens. As the candidates themselves have said, Iranian policy is set by the supreme leader.”

It added: “The elections will not have a significant impact on our approach to Iran, either. Our concerns about Iran’s behavior are unchanged.”

Meanwhile Saturday, Iran’s President-elect Masoud Pezeshkian has vowed to ‘serve all Iranians’ in a victory speech.

Pezeshkian, a reformist candidate, spoke Saturday at the the mausoleum of the late Grand Ayatollah Ruhollah Khomeini, the leader of the 1979 Islamic Revolution, addressing journalists in a chaotic event.

“In this election, I didn’t give you false promises. I did not lie,” the heart surgeon said. “It’s been many years after the revolution that we come to the podium, we make promises and we fail to fulfill them. This is the biggest problem we have.”

The campaign also repeatedly touched on what would happen if former President Donald Trump, who unilaterally withdrew America from the Iran nuclear deal in 2018, won the November election. Iran has held indirect talks with President Joe Biden's administration, though there's been no clear movement back toward constraining Tehran's nuclear program for the lifting of economic sanctions.

Though identifying with reformists and relative moderates within Iran's theocracy during the campaign, Pezeshkian at the same time honored Iran’s paramilitary Revolutionary Guard, on one occasion wearing its uniform to parliament. He repeatedly criticized the United States and praised the Guard for shooting down an American drone in 2019, saying it “delivered a strong punch in the mouth of the Americans and proved to them that our country will not surrender.”

More than 61 million Iranians over the age of 18 were eligible to vote, with about 18 million of them between 18 and 30. Voting was to end at 6 p.m. but was extended until midnight to boost participation.

The late President Ebrahim Raisi, who died in a May helicopter crash, was seen as a protégé of Khamenei and a potential successor as supreme leader.

Still, many knew him for his involvement in the mass executions that Iran conducted in 1988, and for his role in the bloody crackdowns on dissent that followed protests over the 2022 death of Mahsa Amini, a young woman detained by police over allegedly improperly wearing the mandatory headscarf, or hijab.