came only a few days after the Belgian police captured Salah Abdeslam , the only suspect in the Paris assaults believed to have survived , who is considered a potential trove of information . The State Department on Tuesday warned Americans traveling in Europe to “ exercise vigilance when in public places or using mass transportation . ” Terrorist groups , the department travel alert said , “ continue to plan near - term attacks throughout Europe , targeting sporting events , tourist sites , restaurants and transportation . ” Video