Ethiopia's Deriba Merga has won Airtel Delhi Half Marathon in the men's category. Kenya's Marry Keitany came first in the women's category. Olympian Merga was among 30,000 people, including 266 foreign athletes, who participated in the annual event held this morning. Bollywood star Shahrukh Khan and actor Rahul Bose took part in the top-rated running event.The marathon, which has grown in terms of participation as well as popularity in the last five years, is offering 2.10 lakh US dollars as prize money, with the men and women winners bagging 25,000 dollars each.