The United States has urged its citizens in the Middle East to remain alert amid rising security tensions, warning that further escalation could disrupt air travel and threaten American interests in the region and beyond.

In a security alert, the US Department of State advised Americans to prepare for possible flight cancellations, temporary airspace closures and changes to travel schedules as hostilities involving Iran-backed groups continue.

The warning follows attacks by Iranian-supported Houthi rebels against Saudi Arabia, including strikes on civilian airports and other critical infrastructure that have caused civilian casualties and disrupted travel.

The State Department cautioned that the security situation could deteriorate quickly, with the effects potentially spreading beyond the immediate area affected by the fighting.

Americans planning to travel to or from the Middle East have been advised to keep track of developments affecting airports and airlines and make alternative arrangements in case their journeys are interrupted.

Travellers have also been encouraged to confirm their flight status directly with airlines before heading to airports and to prepare contingency plans in case scheduled services are suspended or delayed.

The advisory comes as the conflict involving Saudi Arabia and the Houthis intensifies. Recent attacks on Saudi infrastructure have heightened concerns about the safety of civilian facilities and the impact of the fighting on regional transport and business operations.

Beyond the Middle East, Washington warned that Iran and groups aligned with it could target American interests in other parts of the world.

Potential targets identified in the alert include US businesses and institutions, as well as locations associated with the United States and its citizens overseas.

The warning suggests that the security implications of the regional conflict may extend beyond countries directly involved in the hostilities, prompting Americans abroad to remain aware of their surroundings.

The State Department has encouraged US citizens to follow updates from American embassies and consulates, monitor local news and comply with instructions issued by authorities in their host countries.

Americans have also been advised to consult country-specific travel alerts before making travel decisions, particularly where security conditions remain uncertain.

The department publishes updated travel guidance through its official website, where citizens can check information on individual destinations and any new security developments.

The latest warning underscores growing concerns over the wider consequences of the Middle East conflict, particularly its potential to affect civilian safety, international travel and the security of American interests overseas.