The World Health Organization chief said on Thursday that it has verified 13 attacks on health infrastructure in Iran amid a U.S.-Israeli campaign and it was checking reports that four healthcare workers were killed and 25 others injured.

“An estimated 100,000 people have left Iran and in Lebanon, more than 60,000 people have been displaced,” World Health Organization Director-General Tedros Adhanom Ghebreyesus told a press conference, without attributing blame.

Dr. Hanan Balkhy added at the same briefing that four ambulances in Iran were also affected and that hospitals and other health sites suffered minor damage due to strikes nearby, citing Iranian authorities. One of these hospitals in the capital Tehran was evacuated as a result, the U.N. health agency previously said.

“As of now, for Iran we have verified 13 attacks on health care, resulting in 3 deaths and no injuries. For Lebanon, we have now verified three attacks resulting in three deaths and six injuries,” a WHO spokesperson told Reuters.

Iran’s ambassador to the U.N. in Geneva in a letter to Tedros earlier this week has alleged that 10 facilities have been hit by military strikes.

Balkhy said that the WHO logistics hub in Dubai, which provides health supplies to dozens of countries, is temporarily out of service because of transport restrictions in the region.

A spokesperson from the International Federation of Red Cross and Red Crescent Societies also said on Thursday that three of its workers had been injured in military attacks since February 28 in Iran.

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(Reporting by Christy Santhosh and Emma Farge; Editing by Maju Samuel)