Trump says damage to Iran's nuclear sites is 'far below ground level'

Israel's control of the airspace over Tehran represents a "change in the entire" military "campaign," Israeli Prime Minister Benjamin Netanyahu said in comments on Monday.

"When we control the skies over Tehran, we are striking these goals, the regime's targets, in contrast to the criminal regime of Iran that targets our citizens and comes to kill children and women," Netanyahu said.

"We are telling the citizens of Tehran: 'Get out' -- and we are acting," Netanyahu said.

At least 224 people have been killed in Iran since Israel launched its first strikes there on Friday, according to Iranian authorities. At least 24 people have been killed by Iranian retaliatory strikes in Israel, according to Netanyahu's office.

Iran and Israel have both accused the other of striking civilian targets.

-ABC News' Jordana Miller and Ellie Kaufman

The Israel Defense Forces said in a Monday statement that it killed four senior Iranian intelligence officials in an airstrike in Tehran.

The IDF said the four officials were killed after an Israeli Air Force strike targeted a "structure in Tehran where several senior officials from Iranian intelligence" were located.

"In the strike, the Head of the Islamic Revolutionary Guard Corps (IRGC) Intelligence Organization and his deputy, as well as the Head of the Quds Force Intelligence Department and his deputy, were all eliminated," the IDF said.

-ABC News' Jordana Miller and Ellie Kaufman

The International Atomic Energy Agency is monitoring the situation in Iran "very carefully," the body's Director General Rafael Grossi told the IAEA's board of governors on Monday.

The IAEA is watching Iran's nuclear facilities and the level of radiation "through constant communication with Iranian authorities," Rossi said in a statement published on the IAEA website.

The agency, he added, is ready to respond to an emergency within an hour and will remain present in Iran. Grossi said he is in touch with inspectors on the ground and "stands ready to travel immediately."

Grossi also provided a status update on Iran's three key nuclear facilities -- the fuel enrichment plants at Natanz and Fordow plus the Isfahan nuclear site.

Grossis said there had been no additional damage at Natanz since Israel's opening strikes on Friday, which destroyed the above-ground part of the pilot fuel enrichment plant and electrical infrastructure.

The level of radioactivity remains unchanged and at normal levels outside the Natanz site, but within the facility "there is both radiological and chemical contamination," Grossi said.

Grossi reported that four buildings had been damaged at Isfahan, but that off-site radiation levels remained unchanged.

The IAEA chief said there was no damage at Fordow.

-ABC News' Charlotte Gardiner

The Israeli military said Monday it had achieved "full aerial operational control above Tehran."

Israeli Defense Forces spokesperson Brigadier General Effie Defrin also said that the Israeli military had destroyed one third of Iran's surface-to-surface missile launchers, which Tehran has been using to fire ballistic missiles toward Israel.

-ABC News' Dana Savir, Jordana Miller and Ellie Kaufman