Three people including a police commander were arrested on suspicion that they detained and mistreated scores of Serb civilians, some of them children, in Gorazde, Rudo and Visegrad in 1992-93.
The State Investigation and Protection Agency has arrested former Bosnian Serb fighter Radenko Ilic on suspicion of having participated in war crimes in Rudo, near Rogatica.
Ten former Bosnian Serb Army troops were indicted for allegedly abducting 20 people from a train travelling from Belgrade to Bar in February 1993 and killing them.
In a joint operation, Serbia and Bosnia arrested 15 people suspected of seizing 20 passengers from a train in the Bosnian town of Strpci during wartime in 1993 and killing them.