Fierce fighting continues for the centre of Misurata, the only significant western Libyan city in the hands of the opposition. <br /><br />Forces loyal to Libyan leader Muammar Gaddafi have been pounding it with shells and rockets in recent weeks.<br /><br />But rebel fighters say they are making gains, according to footage from an organisation connected to the National Transitional Council.<br /><br />Al Jazeera's Nick Toksvig reports. (22 Apr 2011)