Flights to the Philadelphia International Airport were grounded on Friday due to a bomb threat, the US Federal Aviation Administration said.
The FAA’s advisory did not provide further details about the bomb threat.
The airport did not immediately respond to a request for comment.
There have been reports of bomb threats at other U.S. airports earlier this month that were cleared without incident.
Operations at the Reagan Washington National Airport faced a brief halt in early November due to a bomb threat against a United Airlines plane. The FBI said at the time it had responded to the report and found nothing hazardous.
On the same day, a Delta flight from LaGuardia International Airport was evacuated before takeoff after reports of a bomb threat.
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