BREAKING Emirates flight to Newark returns back to Athens almost five hours after taking off

Emirates flight to Newark returns back to Athens almost five hours after taking off.
The Boeing 777 started circling above northern Sardinia before diverting back to Greece.

Greek authorities were tipped off by U.S. about a "suspicious" passenger on the plane, according to police sources and local media.

Just after 2000 GMT the plane, escorted by two fighter jets, landed back at the Eleftherios Venizelos airport in Athens for security checks, the sources said.