The United Nations World Food Programme has suspended airdrops of food to residents of the besieged Syrian city of Deir Ezzor because of intense fighting between Syrian Government forces and Islamic State militants. <br/><br/>World Food Program spokeswoman Bettina Luescher has said in Geneva that heavy fighting is going on around the landing zone. WFP has conducted 177 airdrops into Government-held Deir Ezzor since April and it has provided about 3,300 tons of food and other aid for the 110,000 residents of this city, which is surrounded by Islamic State militants. <br/><br/>IS was reported to have cut off the enclave from a nearby military base after launching an offensive on Sunday.