Iran and Israel continued to exchange attacks into Monday amid the latest round of conflict between the two nations.

U.S. refueling aircraft and warships have been dispatched to safeguard U.S. interests as the deadly conflict shows no sign of abating.

The Israel-Iran conflict has escalated into its fourth day with mounting casualties, widening attacks, and no sign of diplomatic resolution.

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

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.

Before Israel launched a wave of strikes against Iran’s nuclear facilities and top military leaders this week, its spies were already on the ground in enemy territory.

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,

Out of precaution, the U.S. withdrew diplomats from Iraq on Wednesday and authorized the voluntary departure of U.S. military families from the Middle East should such an attack occur and prompt retaliation by Iran, the Times and CBS News reported.