The National Council for Human Rights, however, said gunmen inside the encampment shot at police officers, escalating the violence at the sit-in outside Rabaa al-Adawiyah mosque on August 14.
The council's report, released today, is the first official investigation into the breakup of the weekslong sit-in by Mohammed Morsi supporters.
Although the report holds protest organisers responsible for allowing armed men in, it offers a rare criticism of Egyptian security agencies' excessive use of force to break up the sit-in.