The travel alert, which is in effect until February 24, said current information suggested that militants with ISIS, al-Qaeda, Boko Haram and other militant groups continued to plan attacks in several regions around the world.
The release did not provide specifics of any planned attacks or threats, and mentioned no specific regions, except to note attacks this year in France, Nigeria, Denmark, Turkey and Mali.
The department noted that the current information suggested that the Islamic State movement, al-Qaeda, Boko Haram and other terrorist groups are planning more terrorist attacks in multiple regions.
“U.S. citizens should exercise vigilance when in public places or using transportation.
“Be aware of immediate surroundings and avoid large crowds or crowded places,’’ it said.
The State Department said the U.S. was exchanging information with allies about threats of international terrorism.