At the beginning of September, the ARBiH launched an operation known as "Operation Neretva '93" against the HVO in Herzegovina and central Bosnia, on a 200 km long front. It was one of their largest offensives in 1993. The ARBiH expanded its territory west of Jablanica and secured the road to eastern Mostar, while the HVO kept the area of Prozor and secured its forces rear in western Mostar. During the night of 8/9 September, at least 13 Croat civilians were killed by the ARBiH in the Grabovica massacre. 29 Croat civilians were killed in the Uzdol massacre on 14 September.