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, destroying homes and fuelling concerns among world leaders at this week's G7 meeting that the battle between the two old enemies could lead to a broader regional conflict.

The barrage of missiles fired between Israel and Iran continued into a fourth day, with Israel saying it hit an Iranian command center, while Iran hit populated areas of Israel, killing at least eight people.

Iran launched a heavy barrage of missiles at Israeli targets early Monday, hitting Tel Aviv and Haifa and igniting large-scale fires and destruction, in what regional sources described as the most intense assault to date.