Serbian President Boris Tadic on Sunday attended a memorial for the tens of thousands of mainly Serbs and Jews killed by Croatia's pro-Nazi Ustase regime during World War II.
Representatives of the Croatian Serbs and Jews as well as senior Croatian officials, were among several hundred who gathered near the Saranova Jama pit to commemorate the victims, state-run Hrvatski Radio reported.
The pit is one of 32 near the Jadovno camp, in central Croatia, where the the regime dumped their victims' bodies.
Tadic, whose grandfather was killed in Jadovno, stressed the importance of remembering the crimes "so that they never be repeated," the station quoted him as saying.
Serbia and Croatia had a "special responsibility to establish peace" in the volatile Balkans region, he added.
A religious service by an Orthodox priest and a rabbi was held, while a renovated monument to the camp victims, destroyed at the start of the 1991-1995 Serbo-Croatian conflict, was unveiled.
Up to 40,000 people, mostly Serbs and Jews followed by Roma, anti-fascist Croatians and others were killed by the pro-Nazi Ustasha regime during the camp's existence, which only lasted around 100 days.