There have been heavy clashes between Yemen’s Houthi rebels and pro-government forces in the city of Aden.<br />Eyewitnesses have reported dozens have been killed in the fighting.<br /><br /> Beautiful street of Mualla in Aden was burning all day. Heartbreaking, when will this madness stop! #KefayaWar #Yemen pic.twitter.com/KgSauCXHdp— Sarah Jamal (@Sarah_Sanaa) April 5, 2015<br /><br /> Fighting in the southern city has intensified as rebels and forces loyal to President Abd-Rabbu Mansour Hadi battle for control.<br /><br /> The rebel advance comes despite 11 days of airstrikes by a Saudi -led coalition of mainly Gulf forces.<br /><br /> Red Cross to deliver aid<br /><br /> Meanwhile a spokesperson for the military coalition said the International Red Cross is to be allowed in to deliver aid into the country.<br />The agency has been negotiating for nearly a week to deliver life-saving supplies.<br /><br /> Sunni Muslim Saudi-Arabia launched the airstrikes on March 26 targeting convoys and weapons stores in a bid to turn back the Shi’ite Houthi rebe