The incident was reported from Safdarjung Enclave in south Delhi yesterday.
Nidhi Gupta is posted at the regional headquarters of the ICG in Kolkata. She had come to Delhi to celebrate Rakshabandhan at her grandmother's place.
While she was standing outside the house, two bike-borne men, wearing helmets, tried to snatch her chain, she claimed in her police complaint.
She said that they could not snatch her chain but took away her ID card that she was wearing at that time, said a senior police officer.