Former Ducsu vice-president Nurul Haque Nur and six members of Bangladesh Sadharan Chhatra Odhikar Sangrakkhan Parishad were detained last night for protesting the filing of a rape case against six people, including Nur, and later released.

Mahbub Alam, joint commissioner (DB) of DMP, said Nur and the rest were released at 9:45pm.

Walid Hossain, deputy commissioner (media) of Dhaka Metropolitan Police, said the seven were detained around 8:30pm for staging protests unlawfully and because of assault on police in the capital's Matsya Bhaban area.

Asked, he said there is a case filed against Nur and that they were verifying details about the other detainees.

Before his arrest, Nur was in a procession at Dhaka University to protest the case. When the procession came in front of Matsya Bhaban, a scuffle broke out between police and the protesters around 8:30pm.

Earlier, a DU student filed a rape case against Nur and five others, around eight months after the alleged incident.

The student filed the case on Sunday night with Lalbagh Police Station, KM Ashraf Uddin, officer-in-charge of the police station, confirmed.

The other five accused are Hasan Al Mamun, convener of Bangladesh Shadharan Chhatra Odhikar Sangrakkhan Parishad, Nazmul Hasan Sohag and Saiful Islam, joint conveners of the platform; Nazmul Huda, vice-president of the platform and Abdullah Hil Baki, a DU student.

According to the case statement, the incident took place on January 3. Mamun is the main accused in the case, and Nur and the others were accomplices, OC Ashraf said.

In the statement, the victim said that on January 3, Mamun called her to his home in Nababganj and raped her.

She fell sick the next day.

A week later, she got admitted to Dhaka Medical College Hospital, she mentioned in the case statement.

On June 20, she sought Nur's help in this regard. After four days, they met in Nilkhet area where Nur allegedly threatened her not to move further regarding the matter, she alleged, adding that he threatened to shame her on social media.

The woman claimed she was sick both physically and mentally, and that was why it took time to file the case.

In a Facebook live video, Nur, however, said the allegations were baseless and a conspiracy against him.

This correspondent called Mamun over the phone, which was found switched off.