A number of historical sites and monuments across Iran are damaged as the war continues, the Iran's Cultural Heritage Ministry said Tuesday.

ABC News has verified photos showing damage to historical sites in Isfahan and Tehran.

Several buildings are damaged in Isfahan, a city in central Iran known as the “cultural capital” of the country, home to many historical sites and monuments. Among them are Chehel Sotoun and Ali Qapu, which are UNESCO-listed palaces with significant cultural and historical importance as well as being popular tourist destinations, according to photos verified by ABC News.

Tehran’s Golestan Palace, also a UNESCO-listed landmark, has been damaged. Pictures show considerable damage to the palace’s famous Mirror Hall and the Berelian Hall, according to photos verified by ABC News.

Iran’s Ministry of Foreign Affairs spokesman Esmaeil Baqaei urged an international response to the attacks, writing that “the aggressors’ brutal crimes threaten the shared heritage of humankind,” in a post on X on Wednesday.

Iran’s Ministry of Cultural Heritage listed other sites including Isfahan’s Imam Mosque and the historic valleys of Khorramabad as locations exposed to potential damage.

-ABC News' Somayeh Malekian, Maryam Moqaddam, Camilla Alcini, Helena Skinner and Zoe Magee

The State Department says it is now aware of more than 40,000 American citizens who have returned to the U.S. since Feb. 28 and that its 24/7 task force has helped more than 27,000 Americans abroad.

The department’s figure on charter flights stands at “over two dozen,” which have “safely evacuated thousands.” It says these operations are continuing for the time being even though demand is lessening and flights are operating at a 40% capacity.

British Airways announced on Tuesday that it is canceling all of its flights to and from Amman, Jordan; Doha, Qatar; Dubai, UAE; Tel Aviv and Bahrain until later this month.

The airline cited "continuing uncertainty of the situation in the Middle East and airspace instability."

The airline also canceled all of its flights to Abu Dhabi until later this year.

A new Ipsos poll found that 43% of Americans disapprove of the U.S. strikes on Iran, while 29% approve of them. Another 26% are unsure.

The polling, which ran from March 6 to 9, found that 64% say that President Donald Trump has not explained the objectives of the war clearly.

As a result of the U.S. military action in Iran, 67% think gas prices will get worse over the next year, including 85% of Democrats, 73% of independents and 44% of Republicans, the polling found. Nearly half of the respondents think the conflict will have a mostly negative impact on their own personal financial situation.

Americans are also more likely to think U.S. military involvement in Iran will go on for an “extended period of time,” 60%, rather than “end pretty quickly in a matter of weeks,” 36%.

Mojtaba Khamenei, the newly installed supreme leader of Iran, is expected to issue a "strategic" message on Thursday, Iranian state media reported.

Khamenei was chosen on Sunday to replace his father, Ali Khamenei, the former supreme leader, who was killed on the first day of the U.S.-Israeli strikes.

-ABC News' Joe Simonetti