cairo former leader egypt muslim brotherhood islamist movement mohamed akef die cairo hospital illness group lawyer say friday akef supreme guide movement leadership know end 2009. among detain crackdown egypt elect president mohamed mursi also muslim brotherhood oust military 2013. akef daughter announce death facebook page group lawyer abdel monem abdel maqsoud tell reuters receive call prison service report akef death cairo qasr el-eyni hospital president abdel fattah al-sisi engage tough crackdown islamists egypt modern history since topple mursi sisi still head arm force late elect president sisi present bulwark militant extremism egypt battle islamist insurgency northern sinai come attack right group say time power see bad crackdown history former head muslim brotherhood die hospital lawyer