The assailants opened indiscriminate firing on a team of bank personnel when they were on their way to an ATM counter to deposit cash, they said.
The miscreants opened fire the moment the bank employees got down the cash van outside the ATM near Ashok Leyland factory on Dineshpur road, badly injuring three of them including the driver.
As they panicked, the assailants grabbed the bag carrying Rs 15 lakh in cash and drove away, police said.
A search is on to nab the assailants.