It is suspected that there could be a bomb on board so the police has been warned to stay off the plane.
The Cyprus Mail website quoted a Cyprus police spokesman, Andreas Angelides, as saying one armed hijacker had taken control of the Airbus A320 before it diverted to Larnaka.
Angelides was quoted as saying there was no news yet about whether the hijacker was demanding anything specific, or if he was a member of an organisation.
A screengrab from the Flightradar24 website shows the tracked movement of the flight to Cyprus.
Associated Press quoted another Cypriot official as saying it appeared there was more than one hijacker on the plane. The official said there had been no demands other than that police vehicles moved away from the aircraft.
A statement from Egypt’s aviation authority said the flight, MS181, is an Airbus and has 55 passengers on board and five crew members.
We will have more details as soon as they come.