Radical Islamists took over a Cairo mosque and used it to torture Christians who had been protesting against the Muslim Brotherhood.
Fox News reported that mosque officials are so upset over the incident that they've filed a police report.
Leaders of Bilal Ibn Rabah mosque said radicals took control of the building after Friday prayers and then detained Christian and Muslim protestors and tortured them there for hours.
Mosque officials said they, "Deeply regret what has happened and apologize..."
Observers say that more radical elements of the Muslim Brotherhood are gaining power in Egypt and pushing an Islamist agenda.