Flights from Dubai International Airport were suspended for half an hour starting from 10:13 a.m. local time over “suspected drone activity,” a Dubai Airports spokesperson said in an emailed statement.

A hub for Emirates airlines, the airport in Dubai is among the world’s busiest for international travelers.

Dubai Airports has worked closely with the appropriate authorities to ensure that the safety of airport operations has been maintained at all times, the spokesperson said.

A FlyDubai spokesperson said departing flights are delayed by up to an hour due to the shutdown, while there’s no impact on arrivals.