Officials say 12 passengers on two planes that landed at a Philadelphia airport were being investigated by Federal officials because they fell ill on the planes on Thursday afternoon.
One was an American Airlines flight from Paris and the other was an American Airlines flight from Munich, Germany. The passengers reported flu-like symptoms, according to an airport spokesperson.
The passengers were taken to customs with the Centers for Disease Control and Prevention investigating. There were about 250 passengers plus crew on the planes.
Sources told Fox 29 that the passengers are from Saudi Arabia and the FBI "is aware" and monitoring situation.
The CDC runs a quarantine station at the Philadelphia International Airport, which sees two million passengers a year. The CDC did not immediately issue a statement on the situation.
It comes a day after a plane was quarantined in New York after passengers, who also were believed to be from Saudi Arabia, fell ill mid-flight.