The Federal Aviation Administration has warned US airlines flying over the Gulf to exercise caution "due to heightened military activities and increased political tensions in the region."
The advisory, which also covers airspace over the Gulf of Oman, comes amid rising tensions between the US and Iran.
Increased tensions in the region "present an increasing inadvertent risk to US civil aviation operations due to the potential for miscalculation or mis-identification,” said the FAA advisory released late Thursday.
The regulator also warned that aircraft flying in the area could encounter "inadvertent GPS interference and communications jamming, which could occur with little to no warning."
Washington has deployed the USS Abraham Lincoln and its carrier strike group, and B-52 bombers to the region against what it claims is an imminent threat from Tehran.
President Donald Trump's administration has also ordered non-essential diplomatic staff out of Iraq, citing threats from Iranian-backed Iraqi armed groups.
