The U.S.-based Human Rights Activists over the weekend said 1,190 people had been killed according to data collected by the agency's network of medical and local volunteers. Of those, it said 436 were civilians, 435 military and 319 have not yet been identified.
The group has consistently reported higher casualties than the official reports from Iran.
Israel relentlessly attacked Iran beginning June 13, targeting its nuclear sites, defense systems, high-ranking military officials and atomic scientists.
In retaliation, Iran fired more than 550 ballistic missiles at Israel, most of which were intercepted, but those that got through caused damage in many areas and killed 28 people.