The Iranian Red Crescent reported on Monday that at least 555 people have died in U.S. and Israeli airstrikes on Iran since Saturday.
Th atracks targeted 131 residential areas, according to the Fars News Agency.
The last casualty update on Saturday recorded 201 dead and 747 injured.
The joint U.S.-Israeli campaign reportedly killed several senior Iranian officials, including Supreme Leader Ayatollah Ali Khamenei.
In retaliation, Tehran launched drone and missile strikes on Israel, U.S. assets, and Gulf countries.