The woman, a resident of Hardoi district, about 100 kilometres from Lucknow, was at the hospital with her husband for a few days, who underwent a surgery a few days ago.
The woman has alleged that on Tuesday night a liftman at the hospital, Vinay, invited her to have dinner with him. He then forcibly took her inside a lift with the help of a security guard and another person, she claims.
Police say the woman, who approached them this morning, has been sent for a medical examination, and that the two other accused will be arrested soon.
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