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.

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.

Iran has launched more missiles at Israel early Monday morning, according to the Israel Defense Forces. Warning sirens were activated in several areas of the country, including Tel Aviv and Jerusalem. The IDF said the Israeli Air Force was working to "intercept and strike where necessary to eliminate the threat."

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

The death toll is growing as Israel and Iran exchanged missile attacks for a third consecutive day on Sunday, and Israel is warning that worse is to come. Israel targeted Iran's Defense Ministry headquarters in Tehran and sites it alleged were associated with Iran's nuclear program,