The accused were identified as Zahangir Hossain, Badsha Fakir and Liakat Sheikh.
Metropolitan Magistrate Md Baki Billah passed the order.
Earlier, the investigation officers sought 10-day remand for Zahangir and Badsha and seven-day remand of Liakat.
Read Also: Suspected killer of 26 Bangladeshis in Libya killed in drone strike
The cases were filed at Paltan Police Station on charge of trafficking some of the 26 Bangladeshis who were killed in Libya in a gun attack on May 28.
On June 1, Rapid Action Battalion (Rab)members arrested the ringleader of a human trafficking gang KamalHossain alias Hazi Kamal, 55, from Khilbarirtek of Shahadatpur area in theMadarirur city.
Human traffickers killed 30 migrant workers, including 26 Bangladeshi nationals, in Libya in a smuggling warehouse in Mezda, near the city of Gharyan, southwest of Tripoli.
Warlord Haftar’s militiaman Khaled Al-Mishai, who was allegedly responsible for murder of 26 Bangladeshis and 4 African migrants, was killed in a drone strike by the Libyan Air Force.
Read Also: Bangladeshi killing in Libya: Human trafficker held in city