In the weeks leading up to the assault on Srebrenica by the VRS, ARBiH forces were ordered to carry out diversion and disruption attacks on the VRS by the high command. On one particular occasion on the evening of 25–26 June, ARBiH forces attacked VRS units on the Sarajevo-Zvornik, road inflicting high casualties and looting VRS stockpiles. These continued attacks prompted a response from Mladić, who contacted the UN headquarters in Sarajevo and advised that he would no longer tolerate ARBiH incursions into the Bosnian Serb countryside.