(NewsNation) — U.S. military facilities in much of Europe are on alert for a possible terrorist attack, according to a statement from the U.S. European Command headquarters.

The command told personnel in Germany, Romania, Bulgaria, Italy and elsewhere that condition “Charlie” is in effect.

The Charlie threat level “applies when an incident occurs or intelligence is received indicating some form of terrorist action or targeting against personnel or facilities is likely,” according to the Army’s website.

“USEUCOM advises personnel in the European theater to remain vigilant and stay alert at all times,” the command said in a statement. “USEUCOM constantly monitors the security environment to ensure its personnel are informed and best postured to assure the safety of their individual person, family and loved ones.”

The statement did not point to any specific threat, but it comes on the heels of increased alarm about terrorism threats following the October 7 Hamas attack on Israel.

The alert directs U.S. military service members and staffers to be extra vigilant and to expect significant delays at base entry points.

“Charlie” is the second-highest state of alert. The force protection levels are Normal, Alpha, Bravo, Charlie or Delta, the highest state of alert.

“Charlie” comes with several changes in a base’s everyday operations, including a suspension of “nonessential” activities and personnel such as barbershops and some food services. Many others will work from home, according to the statement.

The heightened threat level was first reported by Stars and Stripes.

The U.S. European Command oversees the operations of every branch of the military in Europe and Africa. Its headquarters is in Stuttgart, Germany and directs Army headquarters in Wiesbaden Germany; Naval forces in Naples, Italy, Air Force command in Ramstein Air Base, Germany; Marine and Special Operations forces in Stuttgart, and U.S. Space Forces at Ramstein Air Base.