The incident took place last evening at Charkop. As per the complainant, the accused came at her residence and approached her on the pretext of asking for water, a senior police official said.
When the woman went inside her house, the two eunuchs allegedly spread some chemical in the house after which she became unconscious, said the official.
The duo then took the key of almirah from a drawer in her house and looted jewellery worth Rs 7.5 lakh, he said.
A case under section 394 (voluntary causing hurt in causing robbery), 328 (causing hurt by means of poison etc to commit an offence) and 452 (house trespass after preparation for hurt assault or wrongful restraint) of IPC was registered in this regard, police said, adding investigations are on.