NEW : Leading rebel official calls on international community to help Libyan rebels . At least 10 killed in Misrata shelling , he says . France and Italy call for intensified air strikes . Ex - Foreign Minister Abbas flies to Qatar ahead of an international meeting .
NEW : Leading rebel official calls on international community to help Libyan civilians . At least 10 killed in Misrata shelling , doctor says . France and Britain call for intensified NATO attacks . Ex-Foreign Minister Koussa flies to Qatar ahead of an international meeting .