A major security alert at Gatwick was sparked by a man "discarding an item" at the airport, police say.
The man was arrested and the bomb squad was called following the incident at around 9.30am on Saturday morning.
Detective Superintendent Nick May said it was "too early to say what the item may be".
"Given the events in Paris on Friday evening, there is heightened awareness around any such incident and it is best that we treat the matter in all seriousness," he added.
At this time, we are investigating the circumstances of the incident and it is too early to say what the item may be.
However, given the events in Paris on Friday evening, there is heightened awareness around any such incident and it is best that we treat the matter in all seriousness.
We are aware that there is concern about what has happened in France, but the general threat level remains the same and people should be aware as usual of anyone acting suspiciously.
Police are dealing with an incident involving a "suspicious article" at Gatwick Airport, Sussex Police has told ITV News.
A spokesperson confirmed the North Terminal has been evacuated because of the security scare.
At this time police are dealing with an incident involving a suspicious article in the North Terminal.
Currently the North Terminal is being evacuated as a precaution.
Gatwick Airport says the North Terminal has been evacuated "due to an incident".
The airport said it was a "precautionary measure".
Due to an incident - the North Terminal has been evacuated as a precautionary measure. Extra staff on-site looking after passenger welfare
Gatwick Airport's North Terminal has been evacuated because of a "suspect package", BBC London says it has been told by Sussex Police.
Gatwick Airport's North Terminal has reportedly been evacuated.
It comes amid heightened security following a series of deadly terror attacks in Paris.
Gatwick Airport representatives were not immediately available for comment.
Connor Gillies, a reporter for Capital FM, tweeted a picture showing floods of people making their way outside the terminal.
Gatwick Airport has been evacuated...
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A fire broke out at a Gatwick Airport car park on Wednesday evening.
The fire started near a drop-off point at the north terminal and caused temporary disruption to the airport's shuttle service.
No one was understood to have been injured in the fire.
A Gatwick Airport spokesman said it had been extinguished but the cause remained unknown.
The discovery of oil reserves discovered in the Gatwick airport area has been hailed as 'significant' but analysts have been more cautious.
While the chairman of UK Oil & Gas Investments claimed there were 158 million barrels a square mile over a possible 1,100 square miles others questioned the figures.
ITV News business editor Joel Hills reports.
The extent of the oil reserves discovered near Gatwick Airport have been called into question by a specialist in petroleum science.
Professor Alastair Fraser of Imperial College London told ITV News he thought the number of barrels that UK Oil & Gas Investments said lay in the Weald Basin was "probably a little bit exaggerated on the high side".
He added that the reserves would only become "significant" once the oil could be brought to the surface and at "flow rates that are commercial".
Prospectors have made the biggest oil discovery in the UK in 30 years - and say the true amount sitting underneath the south of England could be an unprecedented tens of billions of barrels.
The substance has been found near Gatwick - but some analysts are sceptical about how much of it can be extracted.
ITV News Science Correspondent Alok Jha reports: