Police arrested some 50 people Friday following a clash between Muslims and Coptic Christians triggered by a land dispute, security officials said. Some 20 people were wounded during the clash in Minya province, some 210 Kilometers (130 miles) south of Cairo, the officials said, speaking on condition of anonymity because they were not authorized to speak to the media. The clashes began after Friday prayers when Muslim villagers in Izbat el-Abid protested against the extension of a monastery in a nearby village, claiming the construction was on state property, the officials said. Police had to ask for reinforcements from throughout Minya to control the clash, the officials added.