Commercial airlines around the world on Monday were weighing how long to suspend Middle East flights after the U.S. struck Iran. Singapore Airlines, one of the highest-profile in Asia, had called the situation "fluid" on Sunday as it cancelled flights from Singapore to Dubai following a security assessment.

British Airways and Singapore Airlines Ltd. canceled flights to the Persian Gulf, increasing aviation disruptions in the region after the US struck three nuclear sites in Iran and Tehran vowed to retaliate.

The strike on Iranian nuclear sites involved more than 125 U.S. aircraft, including seven B-2 stealth bombers, and 14 30,000 pounds of bunker buster bombs, a top general said at the Pentagon Sunday. A

The U.S. Air Force's B-2 Spirit stealth bombers were involved in strikes on Iran's nuclear sites on Saturday. Three Iranian nuclear sites were struck in a "very successful attack," President Donald Trump said on Saturday,