Iraqi forces have made fresh progress in the battle against so-called Islamic State (IS) in Mosul, reportedly taking a key district in the city's east. An army spokesman said Elite troops captured al-Muthana following night-time fighting, putting them in a position to take higher ground nearby. It comes days after Iraqi forces began the second phase of a push to conquer the last major IS stronghold in Iraq. Officials said about two-thirds of east Mosul has been retaken since October. The army said its troops had raised the national flag after capturing al-Muthana.<br/><br/>Iraqi security forces, Kurdish Peshmerga fighters, Sunni Arab tribesmen and Shia militiamen, assisted by US-led coalition warplanes and military advisers, have been involved in the fight. More than 100,000 people have fled their homes in and around Mosul and UN officials are warning that this figure is likely to rise as pro-government forces press further into the city.