With up to a million foreign fans expected in France ahead of the Euro 2016 tournament which will hold from 10 June – 10 July, the US State Department had issued a terror threat to its citizens who plan to visit the country.

“The large number of tourists visiting Europe in the summer months will present greater targets for terrorists,” the State Department said.

France is already under a state of emergency following last year’s Islamist-claimed attacks in Paris.

In March, 32 people died in neighbouring Belgium when suicide blasts hit Brussels airport and a metro station. So-called Islamic State said it was behind both the Paris and Brussels attacks.

In its travel alert for US citizens, the State Department warns of the dangers of militant attacks throughout Europe.

However France has said it will deploy more than 90,000 police, soldiers and private security agents in addition to the anti-drone technology.