The US military has raised the alert level of several bases in Europe to its second-highest level, multiple American media outlets reported on Sunday.
The American bases, located across Europe, were raised to the “Charlie” alert level, ABC News and CNN reported, both citing unnamed officials.
That level is ordered when “an incident occurs or intelligence is received indicating some form of terrorist action or targeting against personnel or facilities is likely”, the US Army says on its website.
The highest level “Delta” is applied when a terrorist attack has taken place or one is “imminent”.
The US European Command (USEUCOM) did not confirm the status change when contacted by Agence France-Presse, but said “we remain vigilant”.
The Pentagon, meanwhile, said “due to a combination of factors potentially impacting the safety and security of US service members and their families stationed in the European theatre, US European Command is redoubling its efforts to stress vigilance during the summer months”.