American media also questioned whether Israel violated an agreement not to use cluster bombs on civilian targets. Although many of the cluster bombs used were advanced M-85 munitions developed by Israel Military Industries, Israel also used older munitions purchased from the US. Evidence during the conflict, hitting civilian areas, although the civilian population had mostly fled. Israel asserts that civilian damage was unavoidable, as Hezbollah ensconced itself in highly populated areas. Simultaneously, indiscriminate Hezbollah rocket fire turned many of its northern towns into virtual ghost towns, in violation of international law. Many bomblets remained undetonated after the war, causing hazard for Lebanese civilians. Israel said that it had not violated any international law because cluster bombs are not illegal and were used only on military targets.