The accused, identified as Shaadab (22), allegedly used to tamper with keys of ATM machines, which disrupted services, and then offer help to users of those machines, they said.
Once the PIN and amount desired to be withdrawn were entered, he used to convince the users that the ATM was out of cash and direct them towards other ATM kiosks nearby, police said.
Once they were gone, Shaadab used to take out cash (the amount desired to be withdrawn by the user) by releasing the buttons he had earlier tampered with, said DCP (Metro) Jitendra Mani.
The police also recovered Rs 10,000 from Shaadab's possession, the amount which the constable was to withdraw. The accused has been booked for cheating and theft, he added.