Iran has told mediators Qatar and Oman that it is not open to negotiating a ceasefire while it is under Israeli attack, an official briefed on the communications told Reuters on Sunday, as the two foes launched fresh attacks and raised fears of a wider conflict.

Israeli attacks on Iran have killed more than 400 people, including at least 197 civilians, according to Human Rights Activists in Iran, a nongovernmental organization that monitors the country. More than 650 people were wounded,