Iraqi forces advance on Mosul mosque where IS declared caliphate

By Marius BoschMOSUL, Iraq (Reuters) - U.S.-backed Iraqi forces on Wednesday began a push towards the mosque in Mosul where Islamic State declared a self-styled caliphate three years ago, military officials said.The forces had encircled the jihadist group's stronghold in the Old City of Mosul, where the medieval Grand al-Nuri Mosqueis located, on Tuesday, they said.The Counter Terrorism Service (CTS) were 200-300 meters (yards) away from the mosque, an Iraqi military statement said, a view suppo