The US State Department warned in a press release Monday 23rd November 2015 that Americans should be on alert to possible travel risks especially during the holidays.
The latest US advisory comes following increased terrorist threats around the world, coupled with attacks from global terror networks.
The travel alert, which is in effect until February 24th, 2016, does not target any particular country.
ISIS, al-Qaeda, Boko Haram and other militant groups continue to plan attacks in several regions around the world.
US authorities said the likelihood of attacks will continue as members of ISIS return from fighting in Syria and Iraq to their home countries and lone-wolf actors perpetrate acts of violence on their own.
Extremists have targeted sporting events, theatres, open markets and aviation targets, pointing to attacks in France, Nigeria, Denmark, Lebanon, Turkey and Mali in the year 2015.