According to Bangladesh Police a woman bring to an end a man's penis during a suspected effort to rape her and took it to a police station as a proof.
The incident happened in Mirzapur village, Jhalakathi, about 200km (124 miles) south of the capital, Dhaka.
Monju Begum 40, a mother of three children told the police that her neighbor Mozammel Haq Mazi forced his way into her shanty and began attacking her.
Mr. Mazi, who rejects the allegations, has been admitted to a close by hospital.
Police spokesman Abul Khaer has said, we will hold him once his condition gets improve.
"She said she fought back and cut off his penis and fetched it to the police station in a polythene bag to show that Mr. Mazi attempted to rape her. The police spokesman said, she has registered a case blaming him of attempted rape," he said.
"It is rather an unexpected incident. As much as I am attentive, this is the first time that a woman has brought a cut off penis to the police station as proof. Monju Begum told police that Mr. Mazi, a married father of five, had been distressing her for the last six months.
On the other hand Mr. Mazi rejected the blames.
We were having a love affair and in the recent times she proposed that both of us can go and quite down in Dhaka, Mr. Mazi told from the hospital in close by Barisal. "I denied and told her that I cannot go away from my wife and children, so she took revenge on me."
Prof AMSM Sharfuzzaman, a senior surgeon at the Sher-e-Bangla Medical College and Hospital in Barisal town, told that it had not been possible to reconnect the organ.
Police brought his cut off penis many hours after the incident," he said. We are treating him so that he can urinate generally without the penis."