Iranian missiles have struck Tel Aviv and Haifa, killing civilians, as Israel vowed swift retaliation and G7 leaders urged restraint.

A volley of missiles launched by Iran killed eight people and injured nearly 100 in Israel on Monday as the conflict between the two countries entered its fourth day.

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."

Israel’s military headquarters were struck after Iran’s Islamic Republic unleashed a barrage of missiles on central Tel Aviv late Friday night, causing “significant damage” to the Jewish state’s equivalent of the Pentagon.

Missile alerts continue in Tel Aviv as five people are reported injured by falling debris, according to Israeli emergency officials. NBC News' Matt Bradley says the smell of dust is in the air as anxiety grips the city amid ongoing Iranian retaliation following Israel’s strike on nuclear facilities.

At least three people were killed and scores were wounded during an aerial battle over Tel Aviv, as Iranian missiles rained down and Israeli rockets attempted to intercept them.

Israeli citizens were ordered to head to bomb shelters on Friday night amid retaliatory missile strikes from Iran.