The State Department issued a global travel alert for U.S. citizens on Monday, citing increased terrorist threats.
The notice extends to Feb. 24 of next year, and comes after deadly attacks in Mali and Paris in the past two weeks. Information suggests that groups such as the so-called Islamic State, al-Qaida and Boko Haram "continue to plan terrorist attacks in multiple regions," the State Department said.
"U.S. citizens should exercise vigilance when in public places or using transportation. Be aware of immediate surroundings and avoid large crowds or crowed places," the notice said.
Citizens were advised to take caution at sporting events, theaters and other public venues that have been targeted in attacks. The State Department added that travelers should take "particular caution" at large holiday events.