The Cairo-based Al-Azhar, Sunni Islam\'s top authority, voiced concern on Monday about the infiltration of gunmen into \"peaceful\" protests across Egypt demanding the resignation of Islamist President Mohamed Morsi. \"Al-Azhar is monitoring with deep concern what is happening, particularly reports of casualties and the arrest of arms smugglers who seem to have infiltrated the peaceful scene in a bid to turn their weapons on gatherings and cause further bloodshed,\" a statement said. It came after at least 16 people died across Egypt on Sunday in clashes between supporters and opponents of Morsi.