Bosnian prosecutors on Friday indicted 15 former ethnic Serb police officers and soldiers for killing more than 150 Muslim civilians at the start of the country's inter-ethnic war in the 1990s.

"It is one of the largest indictments for war crimes in the region of Prijedor" in northwestern Bosnia, a prosecutors statement said.

Thousands gathered Sunday for a final farewell to 284 people killed in Bosnia's 1992-1995 war, after their remains were exhumed from one of the largest mass graves found in the country.

"I hope it will be easier now," said 48-year old Suad Tatarevic, who came to bury some 40 family members lost to the mass killing, including his father and six brothers.