Chennai:
Cash to the tune of Rs 20 lakh was found stolen from an ATM of a private bank at suburban Thoraipakkam on Saturday, police said.
There were no signs of a break-in and police suspect "somebody with technical know how" could have decamped with the cash.
Special teams have been formed and CCTV footage of the ATM centre was being studied to zero in on the culprits, police said.