The incident was reported from Naraina on Saturday and the deceased has been identified as Ranjana who was found hanging in the house of one Vikash Jain who refused to marry her as he was already married. It was Jain who discovered her dead in his house.
Police said the woman's family told investigators that she used to keep the keys of Vikash's house and used to go there to offer him food.
She fell in love with Jain, who works in a private firm, and she had been asking him to marry her. But Jain refused saying, he is already married. Jain is being questioned by police.
"It was Jain who informed police about the incident. She might have taken the extreme step as she was upset over his rejection. We are investigating the case," a senior police official said.