On 18 October, a dispute over a gas station near Novi Travnik that was shared by both armies escalated into armed conflict in the town center. The situation worsened after HVO Commander Ivica Stojak was killed near Travnik on 20 October. On the same day, fighting escalated on an ARBiH roadblock set on the main road through the Lašva Valley. Spontaneous clashes spread throughout the region and resulted in almost 50 casualties until a ceasefire was negotiated by the UNPROFOR on 21 October. On 23 October, a major battle between the ARBiH and the HVO started in the town of Prozor in northern Herzegovina and resulted in an HVO victory.