Milan Bogdanovic, a former Bosnian police commander who is believed to have been involved in the 1995 massacre in Srebrenica, has been arrested.
Prosecutors claim that 65-year-old Bogdanovic was part of a "mass criminal enterprise" that executed 8,000 Muslim men and boys, and expelled 40,000 civilians from the village.
The arrest took place in Srebrenica last Wednesday.