Britain urges travelling fans to be vigilant during Euro 2016

British Defence Secretary Michael Fallon on Saturday warned the travelling England fans heading to France for Euro 2016 that they are "likely" to face a terror attack.

He urged fans to be "very careful" as stadiums were targeted before and may be targeted again.

France remains under a state of emergency following last November's terror attacks which left 130 dead, the Daily Mail reported.

As many as 100,000 England fans are expected in Marseille on Saturday ahead of the nation's opening match against Russia in Group B.

"Fans should be very careful, the risk and the threat level is severe. Stadiums are an obvious target as we have already seen with the Stade de France. Be very vigilant, an attack is likely," Fallon told media.

The tournament is being played under an unprecedented level of security in a country that was still reeling from last November's attacks in Paris, as well as the shootings at the offices of satirical magazine Charlie Hebdo that left 11 dead.