A 60-year-old security-guard of ICICI bank ATM at B.G. Palya circle in Tumakuru city was found dead in the ATM kiosk on Wednesday.
The police said that the deceased has been identified as Shankaralingaiah, native of Hosahalli in Gubbi taluk in the district, police said.
He was on night duty on Tuesday at the kiosk.
But, customers who came to the ATM on Wednesday found the security-guard dead and informed the police.
Police suspect that he might have died due to heart attack.