Two people have been detained in Bosnia on suspicion of taking part in the killing of at least 78 civilians during the 1992-95 war.
The two men were apprehended in Banja Luka, the main town in the Bosnian Serb-run part of the country, according to the prosecutor’s office.
They are suspected of crimes against humanity over the June 1992 killings in the north-western village of Velagici.
Bosnian Serbs slaughtered imprisoned Bosniak civilians, who are mainly Muslims, outside the school building with automatic weapons.
The victims’ bodies were later driven away in trucks and dumped in a mass grave that was exhumed in 1996.
More than 100,000 people died during the war in Bosnia, which erupted when Bosnian Serbs rebelled over the country’s independence from the former Yugoslavia and moved to carve up a mini-state of their own, expelling Bosniaks and Croats from the territory.