TEHRAN—The official leading Iran's response to the worst coronavirus outbreak in the Middle East on Sunday acknowledged that the pandemic could overwhelm health facilities in the country, which is under severe U.S. sanctions.

Iran is battling one of the worst outbreaks outside China, with nearly 13,000 confirmed cases and more than 600 fatalities. The real number of infections could be even higher, as questions have been raised about the government's transparency.

“If the trend continues, there will not be enough capacity,” Ali Reza Zali, who is leading the campaign against the outbreak, was quoted as saying by the state-run IRNA news agency.

Iran is believed to have around 110,000 hospital beds, including 30,000 in the capital, Tehran. Authorities have pledged to set up mobile clinics as needed.

Zali also acknowledged that “many” of those who have died from the COVID-19 illness caused by the virus were otherwise healthy, a rare admission by local authorities that the virus does not only prey on the sick and elderly.

The Health Ministry released figures showing that while 55% of fatalities were in their 60s, some 15% were younger than 40.

For most people, the new coronavirus causes only mild or moderate symptoms, such as fever and cough. For some, especially older adults and people with existing health problems, it can cause more severe illness, including pneumonia.

Most people recover in a matter of weeks. But the virus is highly contagious and can be spread by individuals with no visible symptoms.

The virus has infected more than 150,000 people worldwide and killed more than 5,700. More than 70,000 people worldwide have recovered after being infected.

In Iran, the virus has even infected a number of senior officials, including the senior vice president, Cabinet ministers, members of parliament, Revolutionary Guard members and Health Ministry officials.

The country has struggled to respond in part because of crippling sanctions imposed by the Trump administration after it withdrew from the 2015 nuclear deal. Last week, Iran asked the International Monetary Fund for a $5 billion loan, the first time it has sought help from the international lender since before the 1979 Islamic Revolution.

The U.S. says it has offered humanitarian aid but that Iran has rejected it.

Countries across the Middle East have imposed sweeping travel restrictions, cancelled public events and in some cases called on non-essential businesses to close for the coming weeks. They have also pledged stimulus to try and contain the economic fallout from the pandemic.

The central bank of the United Arab Emirates, home to the skyscraper-studded city of Dubai, on Sunday announced a $27 billion stimulus package. The money will go toward supporting the country’s banks, and regulatory limits on loans will be eased.

Dubai Parks & Resorts announced it would be closed through the end of the month. The sprawling amusement park, built at a cost of $3 billion, has lost hundreds of millions of dollars since opening.

Abu Dhabi, the capital of the UAE, shut down its amusement parks and museums through the end of the month, including Louvre Abu Dhabi.

Tiny, oil-rich Kuwait meanwhile shut down malls, salons and barbershops to slow the spread of the virus. Authorities allowed coffee shops to remain open, but said no more than five customers can wait in line at a time and must be a meter apart from each other.

Saudi Arabia separately announced its own $13 billion stimulus plan.

In Israel, Prime Minister Benjamin Netanyahu's trial on serious corruption charges, which was supposed to begin this week, was postponed for two months due to restrictions on public gatherings.

Netanyahu has meanwhile been pressing for an emergency unity government with his main rival, former military chief Benny Gantz, following three inconclusive elections and more than a year of political deadlock. Gantz has appeared open to the idea.

Israel imposed sweeping travel and quarantine measures more than a week ago but has seen its number of confirmed cases double in the last two days, to around 200. On Saturday, the government said restaurants, malls, movies, gyms and daycare centers would close. Schools and universities have already been shut down until next month.

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Associated Press writers Joseph Krauss and Aron Heller in Jerusalem contributed to this report.