[JURIST] Egypt has extended the detention period for four leaders of the Muslim Brotherhood [backgrounder] arrested in May [JURIST report] after the group held nationwide protests for political reform. Hundreds of group members were arrested during protests in favor of multi-candidate presidential elections. The arrests have drawn criticism from human rights groups [Human Rights Watch press release] and the number of political detainees still being held is in dispute. Laws passed in 1981 allow the Egyptian government to hold suspects for six months without trial and allows them to be re-arrested indefinitely. AP has more.