Historic monuments in Isfahan, including the Safavid-era Chehel Sotoun palace, sustained damage after an Israeli airstrike hit the provincial governor's building on Monday, CNN reports, citing eyewitnesses.

The palace is located near the governor's office, and the blast wave from the strike reportedly damaged parts of the complex, known for its frescoes, reflecting pool, and historic halls dating to the 17th century.

An Isfahan resident described heightened security measures around the monument, noting that surrounding streets were blocked and people were not allowed to approach: "They are very strictly blocking the surrounding streets. You can't pass by car or on foot, sometimes they check phones. There are almost no photos," he said. "Between the Chehel Sotoun building and the governor's office, there are only a few trees, and it seems even they were damaged," the resident added.

Damage is also reported around Naqsh-e Jahan Square, a UNESCO World Heritage Site containing monuments such as the Ali Qapu palace and several historic mosques.

These reports come days after UNESCO warned of risks to cultural heritage sites in Iran following previous strikes on Tehran. In a statement regarding damage to Golestan Palace in Tehran, the agency said the site "presumably suffered from debris and the shockwave of an airstrike" near Arg Square in the capital. UNESCO noted it is "carefully monitoring the cultural heritage situation" in Iran and the region.