One of the Catholic Church’s leading experts on Islam says the Swiss authorities need to keep a closer eye on the country’s mosques. Pierre Bürcher, assistant bishop of Lausanne, Geneva and Fribourg, tells swissinfo it is what goes on inside mosques rather than the construction of minarets that poses a greater threat to peace. His comments come just weeks after a group of rightwing politicians launched a nationwide campaign to ban the construction of minarets.