In May 2014, B’Tselem cautioned that the number of Palestinians held by Israel in administrative detention was rising. At the end of August, after Operation Brother’s Keeper, there were some 473 administrative detainees – the highest number since April 2009. Administrative detention is detention without trial. The security establishment uses it extensively, in breach of the restrictions placed by international law. The government of Israel must release all administrative detainees or prosecute them, in accordance with due process.