Israel's military says it struck a "communications centre of the Iranian regime", but Iran calls the attack a "war crime".

Mohammad-Reza Zafarghandi said in an update that an Israeli strike on Sunday on Quds Square in northern Tehran injured 59 civilians and killed 12 people, including a pregnant woman. That attack also ruptured a main water pipeline.

Iran has arrested dozens of people on suspicion of spying as fears grow in the Islamic Republic over the extent of its infiltration by Israel’s Mossad intelligence service.

Israel's air force achieved a "remarkable feat," said William Freer, a research fellow for national security at the U.K.-based Council on Geostrategy.

Oman and Qatar were leading efforts to begin ceasefire talks, while mediators said Iran was open to resuming nuclear negotiations if Israel’s attacks stop.

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"Israel is being assisted this way or that way by some Iranians," ex-Israeli National Security chief Giora Eiland told Newsweek.

KANANASKIS, Alberta (Reuters) -French President Emmanuel Macron said on Monday that U.S. President Donald Trump had made an offer for a ceasefire between Israel and Iran. "There is indeed an offer to meet and exchange. An offer was made especially to get a ceasefire and to then kick-start broader discussions," Macron told reporters at the G7.