Two unidentified men wearing helmets tried to break open and rob an ATM kiosk in Nolambur early on Monday.

Police sources the incident took place at 2.15 a.m. at the ATM kiosk on 60 Feet Road, Mogappair Lake Scheme. The duo attacked Dilli (62), the guard on duty, before they got into the kiosk.

Dilli managed to raise an alarm. A few men, travelling on a van to the Koyambedu vegetable market, heard Dilli's cries and rushed to help him. But the suspects managed to escape, sources said.

Nolambur police have registered a case and are investigating.