gurugram two youths posing as prospective tenants entered a sector 14 house tied a 70yearold woman staying alone to a chair and was about to flee when her son arrived to check on his mother on friday afternoon they managed to push aside the son and flee with cash and jewellery on a bike that did not have a number platepolice said the modus operandi resembled that of the doorbell gang which is known to make a friendly entry to houses take the occupants hostage and loot cash and jewellery on friday too the two youths rang the doorbell of the house where a to let sign had been hung outside when omwati devi opened the door they asked her politely if she would like to show them the house she allowed them in omwati devi lives alone on the ground floor of the threestoried house in sector 14 she has a tenant on the first floor while the second floor is vacant her son lives with his family in sector 47 her son rajender singh yadav 42 said his mother called him around 1220pm and said two youths had come looking for the second floor house yadav reached sector 14 around three hours later when yadav rang the doorbell a youth in his late 20s opened the door behind the main gate and enquired if he was the tenant who stayed on the first floor without answering his question i insisted he open the door he went inside and said he would have to ask aunty my mother he saidin a minute he returned with another youth i told them to open the gate but they kept asking me if i was the tenant who stayed upstairs i told them i was the owner of the house and asked them sternly to open the gate they opened the gate this time pushed me aside and ran towards the main road i gave them a chase and tried to note down the bike number but it did not have any said yadavhe rushed inside and found his mother tied to a chair with a cloth her mouth was taped