Serb leader Tadic visits mass grave
President Boris Tadic has become the first Serbian leader to visit a site where more than 200 Croatians were killed in a 1991 massacre during Croatia's war of independence.
Mr Tadic was welcomed by Croatian President Ivo Josipovic before visiting Ovcara, near the town of Vukovar, the scene of a massacre which remains a painful symbol of Serbian wartime brutality.
The Serbian leader said he came to the area to "bow down before the victims" and "once again offer words of apology and express regret".
Relations between the two countries could be further improved as Mr Tadic and Mr Josipovic will lay wreaths in the nearby village of Paulin Dvor - where 18 Serbs were killed by Croats in 1991.