Iran and Israel continued on Sunday their aerial attacks, which began Friday with a series of Israeli strikes on Iran.

The retaliatory strikes came on Saturday, a day after Israel killed top Iranian military leaders and scientists and destroyed an aboveground nuclear enrichment plant near Natanz.

CONFLICT ENTERS FOURTH DAY: Israel and Iran have begun a new round of attacks, as the conflict between the two heavily armed rivals enters its fourth day.

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

After striking back on Friday night, Iran launched a new wave of strikes toward Israel on Saturday morning. Now, the two countries continue to exchange deadly missiles and threats, with fatalities and injuries reported on both sides.

Israel and Iran have traded more missile attacks despite international calls for a halt to the fighting, with neither country showing signs of backing down as the conflict between the regional foes raged for a third day.

Stocks are down on Friday, with oil prices surging in the wake of the Israel's military strike on Iran. The S&P 500 slid 48 points, or 0.5%, to 5,998 points in early trading, while the Dow Jones Industrial Average dropped 559 points,