As the victim informed the law enforcers after the incident, they launched a manhunt, and nabbed the accused that night.
Police held 18-year-old Md Raihan, the victim's cousin, Alamin, Joy Mia, Imran, 19-year-old Md Emon, and Abu Sayeed.
"The victim filed a case on Thursday in connection with the incident. Samples were collected from the spot, and legal action is also being taken," Mirpur Model Police Station Officer-In-Charge Md Mostafizur Rahman said.
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"The 18-year-old victim has been sent to the one-stop crisis centre (OCC) for primary treatment, mental trauma support, and DNA collection."
Bangladesh has seen a spurt in rape crimes in recent months. Between January and September, nearly 1,000 rape cases, including over 200 gang rape, were reported, according to rights group Ain o Salish Kendra.
Amid widespread protests, the government made death penalty highest punishment for rape. The parliament passed the bill last week.