On 27 and 28 April 1999, the Yugoslav Army (VJ) and Serbian Ministry of Interior (MUP) conducted a joint, large-scale operation named “Operation Reka” in the Kosovo villages lying west of the town of Gjakovë/Đakovica. During the operation, members of Serbian forces killed at least 350 ethnic Albanian civilians, and expelled thousands more to Albania. The mortal remains of 309 victims were found in the secret mass graves in Belgrade suburb in 2001. With the number of victims, the attack against the civilian population in the Reka e Keq/Reka Valley was the gravest crime against civilians committed during the war in Kosovo, and among the gravest of all the crimes committed in the 1990s in the wars in the former Yugoslavia.