Police have pressed charges against five people, including Apan Jewellers owner's son Safat Ahmed and his two friends.
On Monday, the Women and Child Repression Prevention Tribunal-2 accepted the chargesheet submitted by police and fixed Jul 9 for the indictment hearing.
Police produced the five suspects before the court, which denied bail to them, said Prosecutor Ali Akbar.
Safat Ahmed had invited them to his birthday party at Banani's Raintree Hotel on Mar 28. The girls said he and his friend Nayem Ashraf forced them inside a room and raped them at gunpoint.
They accused three others -- Regnum group director Shadman Sakif, Shafat's driver Billal Hossain and bodyguard Rahmat Ali -- of aiding the rapists and filming the sexual assault.
Shafat and Shadman were arrested from Sylhet on May 11. Billal and Rahmat were arrested in Dhaka on May 15.
Two days later, Nayem Ashraf, known as Hasan Mohammad Halim in his native Sirajganj, was arrested from Munshiganj.