At least 13 hospitals and other health facilities were affected during the US and Israeli attacks on Iran, global health chiefs said.
The World Health Organization (WHO) said it was verifying reports that four doctors had died and 25 others had been injured.
At least 1,230 people have been killed in Iran, more than 100 in Lebanon and 13 in Israel since the war began, according to official statements. Thousands more have been injured across the region. Six American soldiers have also died.
The death toll includes dozens of schoolchildren who were killed in an attack on the Shajareh Tayyebeh school in Minab, southern Iran, on Saturday.
The WHO warned that the conflict was endangering international humanitarian supply chains and that operations at its global emergency logistics center in Dubai had been suspended.
In a briefing on Thursday, Tedros Adhanom Ghebreyesus, WHO director-general, said he had “verified 13 attacks on healthcare in Iran and one in Lebanon.”
Ghebreyesus did not elaborate or assign blame, but said: “Under international humanitarian law, health care must be protected and not attacked.”
Dr. Hanan Balkhy, WHO regional director for the Eastern Mediterranean, said at the same briefing that four ambulances in Iran had been hit and that hospitals and other health centers suffered minor damage due to nearby strikes, citing Iranian authorities.
Hospitals and clinics in Lebanon have been forced to close due to evacuation orders, he said.
The WHO had earlier said that a hospital in Tehran, Iran’s capital, was evacuated after nearby explosions.
In a letter to Ghebreyesus earlier this week, Iran’s ambassador to the UN in Geneva alleged that 10 facilities had been hit by military strikes.
“The impact goes beyond the countries immediately affected,” Ghebreyesus said. “Operations at the WHO logistics center for global health emergencies in Dubai are currently suspended due to insecurity.”
The center processed more than 500 emergency orders for 75 countries last year, Balkhy told reporters, but was unable to operate “due to insecurity, airspace closures and restrictions affecting access to the Strait of Hormuz.”
He warned: “Humanitarian health supply chains are now at risk.”
The disruption, he said, was preventing access to $18m (£13.5m) in humanitarian health supplies, while another $8m in shipments cannot reach the centre.
He said $1.6 million in polio laboratory supplies were being withheld, which could have dire impacts for Afghanistan and Pakistan, where the disease is endemic.
It was also affecting more than 50 requests for emergency supplies from 25 countries, as well as $6 million in medicine destined for the Gaza Strip.
Humanitarian groups had already expressed concern about the impact of the war, after Israel closed all crossings into Gaza when it attacked Iran.
Ghebreyesus added that the conflict was causing significant displacement, with some 100,000 people leaving Iran so far and 60,000 displaced in Lebanon, even before evacuation orders were issued for Beirut’s southern suburbs.
He said the threat of nuclear facilities being affected was also worrying as it could have serious consequences for public health.
Additional information from Reuters and AFP
