A gang holding petrol bombs marched through a narrow lane in Delhi's Adarsh Nagar last night following a fight between three people living in the same neighbourhood. A group of youngsters were marching toward a house, with their faces covered, around 11:30 pm on Thursday, visuals from a surveillance camera outside a house showed. A man and a woman, who were ahead of the group, were running after spotting the gang heading in their direction with petrol bombs.