At least five people are feared killed and more than 50 injured as a bomb exploded in a crowded market in south Delhi.The explosion, that comes a fortnight after serial blasts rocked the national Capital, took place in the Mehrauli market area on Saturday afternoon, a senior police official says.According to police sources and eyewitness reports, two youth came on a motorbike and left a black bag that exploded minutes later. Police have also confirmed the bomb was triggered from a device placed in a tiffin box. According to initial reports, the blast took place in an electronic shop in the Sarai area of Mehrauli. At least 14 among the 50 injured have been rushed to trauma centre of the All India Institute of Medical Sciences. One child was reportedly declared dead on arrival. AIIMS spokesperson Y K Gupta tells CNN-IBN the team of doctors is ready for everything.Fire tenders and ambulances rushed to the spot and police have cordoned off 30-m area around the blast site.Mehrauli is a commercial hub that houses a number of hardware shops.