U.K. Authorities Call for Vigilance at Euro 2016

Euro 2016 Attacks Soldiers
French military patrol a fan zone before the start of the European Championship, Paris, June 7. British authorities have warned fans attending the competition to be vigilant. Gonzalo Fuentes/Reuters

British authorities have warned football fans travelling to the Euro 2016 tournament in France to be on their guard "at all times."

In travel advice updated Tuesday, Britain's Foreign and Commonwealth Office (FCO) said that "there is a high threat from terrorism" in France. It added: "During Euro 2016, stadiums, fan zones, venues broadcasting the tournament and transport hubs and links represent potential targets for terrorist attacks."

"You should be vigilant at all times, especially in areas hosting Euro 2016 events, and follow the advice of local French authorities," the advice said.

"Due to ongoing threats to France by Islamist terrorist groups, and recent French military intervention against Daesh (formerly referred to as ISIL), the French government has warned the public to be especially vigilant and has reinforced its security measures."

It also noted that flooding, which has swept France and Germany in recent days, is affecting road and rail travel.

The updated guidance comes after Ukranian authorities said they had prevented 15 potential attacks after a arresting a suspect thought to be targeting the games.

Strikes and demonstrations against planned changes to the country's labor laws had also sparked fears about disrupting the tournament.