Israel and Iran launched fresh attacks on each other late on Saturday, stoking fears of a wider conflict after Israel expanded its surprise campaign against its main rival with a strike on the world's biggest gas field.

Iran launched dozens of ballistic missiles toward Israel on Friday night in retaliation for Israel's surprise attack early Friday. Israel struck at the heart of the Iran's nuclear program, killing several nuclear scientists as well as high-ranking military leaders, according to Israeli officials.

Fox News reporter Trey Yingst was standing on a balcony as short-range missiles behind him appeared to come closer before being intercepted by Israel's Iron Dome defense system. The footage of the incident preceded a night in which Israel and Iran traded fire, with explosions heard in Tel Aviv, Jerusalem and Tehran.

The Israeli military said it struck Iran early Friday morning, attacking dozens of targets, including nuclear sites, and killing top Iranian military officials and scientists.