Tehran said American bases in the Middle East could face reprisals if the U.S. helped repel Iranian attacks on Israel.

Israel’s ongoing attacks on Iranian nuclear sites, generals, and scientists killed 78 people and wounded more than 320 on Friday, Iran’s ambassador told the U.N. Security Council, but he said “the overwhelming majority” of victims were civilians. Israel described the new wave of hostilities as the beginning of “Operation Rising Lion.”

While Israel and Iran trade attacks, Palestinians in Gaza have been struggling to find food, connect to the internet and survive airstrikes.

Sirens sounded in Israel as Iran launched dozens of ballistic missiles in retaliation for Israel's strikes on its nuclear facilities.

Atlanta-based Delta Air Lines is suspending its flights to Israel through August in response to conflict in the region. The move comes after Israel launched strikes across Iran, targeting Iran’s nuclear program and military sites, The Associated Press reported.

"This confrontation will not end with last night's limited actions and Iran's strikes will continue, and this action will be very painful and regrettable for the aggressors," Fars reported, citing senior military officials.