sarajevo islamic state flag fly bosnia prime minister denis zvizdic say tuesday dismiss allegations european leaders radical bosnian muslims balkan country pose terrorist threat europe bosnian muslims generally practice moderate form islam adopt radical salafi islam foreign fighters come country 1992-95 war fight alongside muslims orthodox serbs catholic croats join islamic state syria iraq police say departures stop completely past 18 months half return jail law prohibit people fight foreign countries czech president milos zeman say risk islamic state may form european base bosnia isis islamic state black flag already fly several towns accord report croatian president kolinda grabar-kitarovic warn thousands fighters return bosnia syria iraq croatian magazine globus last week put number radicalize bosnian muslims 5,000-10,000. zvizdic say allegations unfounded politically motivate could damage bosnia investment tourism destination isis flag fly bosnia zvizdic tell reporters meet security minister head five security intelligence agencies departures foreign war zone incident could characterize act terrorism work prevent possibility incident zvizdic say refer last two years several terrorist attack take place across europe bosnia security agencies say total 240 bosnian citizens depart fight islamic state since 2012 116 remain 44 return bosnia 23 jail security minister dragan mektic say terrorism threats bosnia mainly external agencies last month prevent person possible link terrorists enter country 2015 two bosnian army soldier policeman kill two separate attack bosnia link wide group find islamic state flag fly bosnia pm