The incident occurred last evening at the Malviya Nagar Metro Station when Central Industrial Security Force (CISF) Sub-Inspector Mohar Singh spotted an "unattended bag" at the X-ray baggage scanner.
"The bag was brought for security checking and after it was found that it has been forgotten by a passenger, it was handed over intact to the station controller office," a senior officer said.
He said after about two hours, a resident of Saket in south Delhi came back to claim the bag and after due verification it was handed over to him.