New Delhi, April 16 (IANS) Three persons were arrested on the charge of killing a petrol pump employee when he resisted their robbery attempt in north Delhi, police said on Monday. The accused, all residents of Adarsh Nagar, were arrested on Sunday from their hideouts in north Delhi. Nikhil Saxena, 19, Vishal Sonkar, 23 and Puneet, 24 killed Naresh on April 13 while he was returning home. A motorist had informed the police about a man, later identified as Naresh,…