Police suspect the involvement of a single gang. In the first incident, the ATM of a nationalised bank at Irumbanam in Thrippunithura in Ernakulam district was looted.
The burglars then targeted an ATM of a private bank at Koratty in Thrissur district, using a similar method to loot Rs ten lakh. They fled after pulling down the shutter of the ATM kiosk at around 4.30 am, police said.
Police said CCTV footage reveals that a gang member had sprayed paint at the cameras in the kiosks before committing the crime.
(With inputs from agencies.)