NEW DELHI, Oct 14: A private bus (M13) plying between Kalkaji and the New Delhi railway station rammed the side-wall of the Moolchand flyover late tonight. Nearly one fourth of the bus was seen hanging precariously from the flyover. There were no passengers in the bus and the driver was absconding.The accident apparently took place as one of the wheels came off leaving the bus completely out of control. The debris of the flyover wall did not injure anybody as there was a red light at the intersection beneath.