One of the accused -- Manik Kundu, a resident of Pattipur in Phultala upazila of Khulna -- was known to the woman, police said, adding efforts were on to nab them.
Touhidul Islam, additional SP of Jashore, said Saturday that Manik had lured the woman -- an orphan who grew up at a relative's place in Abhoynagar -- to Sadar on promise of a job for which he earlier took Tk 20,000 from her.
According to the woman's complaint, Manik asked her to meet him in Sadar upazila on Friday evening. When she arrived at the spot, Manik asked her to accompany him to her potential employer's house.
Unsuspecting, she went. The two soon boarded a public transport for Hashimpur. But enroute, two of Manik's accomplices joined them.
Also read: Disabled woman raped on moving train; rail employee detained
"All of them got off at Bahadurpur village minutes later. But instead of taking her to her potential employer's house, they dragged her to a field where they took turns to rape her," the additional SP said.
The woman was also thrashed by the alleged rapists when she resisted and threatened with dire consequences if she narrated her ordeal to anyone. She was later spotted by a passerby who rushed her to Jashore General Hospital.
A probe is on, the officer said.
Also read: Bangladesh introduces death penalty for rape
Rapes in Bangladesh
Cases of rape are on the rise in Bangladesh, despite the government introducing death penalty for the heinous crime.
According to data compiled by Ain o Salish Kendra (ASK), a rights group, 1,018 children were raped last year alone, but only 683 cases were filed at police stations. Among them, some 116 were of 6 years or below.
Overall, 1,627 cases of rape were reported last year and 53 of them were killed by the perpetrators after the crime while 14 took their own lives, the ASK data reveals.
In November last, Bangladesh introduced the death penalty for rape cases, following days of protests against sexual violence against women.
Also read: Death penalty fails to deter rapes
Although many have appreciated the government for introducing the death penalty, gang rapes in Bangladesh continue to hit headlines.
In October last, the country was rocked by huge protests after a woman was attacked and raped in Noakhali district. In another case in Sylhet a week later, a woman was gang raped at a hostel, triggering nationwide protests again.