Mostar unbridged ahead of last UN Bosnian war verdict A symbol of Bosnia's devastation in the 1990s war, Mostar's iconic Ottoman-era bridge was later rebuilt to its former glory. But residents of the southern city remain sharply segregated by ethnicity with Mostar's main boulevard acting like a border between its two main communities: Bosniak Muslims on the east side and Catholic Croats on the west. Their division is a legacy of Bosnia's "war within a war", which saw Muslims and Croats turn on each other in 1993 after initially fighting together against Serbs.