(AGI) Lagos, Nov 5 - Within hours of army orders to retakeMubi, Boko Haram fighters have defied the Nigerian authoritiesby renaming the shopping centre and second biggest city inAdamawa state Madunital Islam (City of Islam). Mobi North andMobi South and the Michika and Madagali centres are currentlyfirmly in extremist hands. Local sources reported that theIslamists had set up road blocks and urged local residents notto flee but to remain in the areas under Boko Haram control,safer than the Nigerian territory. One of the trapped residentssaid that, despite reassurances, thousands of frightenedresidents had already fled the city. .