Police, however, said they were suspicious of the claims of the robbery made by the woman.
Police said, as per the complaint of the 26-year-old woman, she was alone in the house when the robbers entered her third floor flat at around 2 pm.
At that time, her husband and father-in-law were at their shop at in Jehangirpuri are, while her mother-in-law was also out. Her two children had gone to school.
The claims of the woman are being verified, a senior police officer said.
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The woman told the police the robbers entered her room when she was sleeping and held her hostage by making her take off her saree and tying her with it.
She claimed she freed her somehow after they left, and then alerted the neighbours.
They also allegedly chopped off her hair when she tried to resist them.
The robbers spent considerable time in the house and without looking for anything anywhere else, took away Rs 4 lakh cash and the jewellery kept "secretly in dirty clothes piled on a shelf in the room", said the officer.
Also, the robbers allegedly took lunch in the house and were not disturbed by the pet of the family, which brought the whole story under suspicion, he said.
The police is also suspicious of the claims of robbery as the cash and jewellery were to be distributed between the woman's husband and his elder brother.
Police scanned the the CCTV footages from the colony where the family lived in Mahavir Kapda Market in Lahori Gate and noticed some persons entering the building. Questioning is underway to establish the sequence of events.