Hamas authorities stormed a mosque where a radical Islamic cleric with ties to al Qaeda is holed up with roughly 100 followers. At least 13 people have been killed and 60 injured, the BBC reports. The cleric, Abdul-Latif Moussa, allegedly ordered the firing of rocket-propelled grenades near the Egyptian border, killing several people. Moussa and his followers are part of a group called Jund Ansar Allah (Army of the Helpers of God), which believes Hamas is not radical enough. They have vowed to fight to the death.