The deceased has been identified as Chandra Kochar (60), police said.
She was travelling pillion on a scooter with her husband, Ashok Kumar, around 10 AM when the bus hit their scooter and the couple fell down, following which the errant driver left the vehicle and fled, a police official said.
It was a school bus which was pressed into service as a public vehicle for the fortnight in view of the odd-even scheme in the city, said the official.
A case of rash driving and causing death by negligence has been registered and efforts are on to nab the driver, said the official.
Kochhar was an accountant at a central government office. She lived with her family at southwest Delhi's Kalkaji area, the official added.
