According to the US-based Human Rights Activists News Agency (HRANA), at least 1,114 civilians in Iran have been killed since the war began on Saturday.

That toll includes 183 children, most of them under the age of 10, according to the latest figures released by HRANA on Thursday. The organization is still working to verify more than 900 reported deaths, The Caspian Post reports, citing foreign media.

Some of the latest strikes in the past day have reportedly hit civilian sites protected by humanitarian international law, HRANA added -- including a high school and several medical sites and clinics.

The death toll for this latest conflict is now approaching the total toll of last summer’s 12-day war between Iran, Israel and the US - which HRANA estimates killed 1,190 people in Iran.

Dozens of people, including six US troops, have also been killed elsewhere in the Middle East by Tehran’s retaliatory strikes, according to local authorities.