Meanwhile Donald Trump says his early G7 exit has "nothing to do" with an Israel-Iran ceasefire, as fighting between the two nations enters a fifth day.

The Iran-Israel conflict has shuttered airspace across the Middle East as the two bitter enemies launch attacks and reprisals at one another.

NBC's Matt Bradley said Monday night was "quite a bit less terrifying" than Friday, Saturday or Sunday, and the Iranians could be "running out of steam." "According to the IDF, last night was the lightest Iranian assault on Israel since this all began with Israel’s attacks against Iran on Friday morning,

A rare daytime missile barrage on Tel Aviv forces millions into shelters as Israeli forces retaliate against Iran's missile-launching capabilities.

At least seven people were killed and more than 100 injured when an Iranian ballistic missile hit Bat Yam, just south of Tel Aviv, overnight on Sunday, domestic media reported. Other reports put the death toll at six people. Israel's police said residential buildings took a "direct hit that caused extensive damage."

Aerial attacks between Israel and Iran continued overnight into Monday, marking a fourth day of strikes following Israel's Friday attack. That surprise strike hit the heart of Iran's nuclear program, killing several nuclear scientists as well as high-ranking military leaders, according to Israeli officials.

Both countries have closed their airspaces, leaving few options for citizens of other countries seeking to leave.

By Alexander Cornwell, Parisa Hafezi and Jeff Mason TEL AVIV/DUBAI/WASHINGTON (Reuters) -Iranian missiles struck Israel's Tel Aviv and the port city of Haifa before dawn on Monday, killing at least eight people and destroying homes,