In all, at least 20 senior commanders were killed, two regional sources said. The head of the Revolutionary Guards aerospace force was also reported to be among them.

The U.S. and Iran will meet in Oman for a sixth round of negotiations aimed at curbing Tehran’s accelerating nuclear activities.

Oman’s foreign minister says there will be a sixth round of negotiations between Iran and the United States over Tehran’s rapidly advancing nuclear program this weekend

The Israeli strikes killed top Iranian military leaders and nuclear scientists ahead of planned weekend negotiations aimed at addressing international concerns over Iran's uranium enrichment program.

Market watchers believe a full-scale disruption of global oil flows by closing the waterway is unlikely, and might even be physically impossible.

Oman said it condemned Israel's attack on Iran and that it holds it responsible for any escalation in the region, in a statement early Friday local time. It said the attack was on sovereign facilities and caused civilian casualties.

The State Department said it had "ordered the departure of non-emergency U.S. government personnel due to heightened regional tensions.”