The detainees are Muktar Hossain, 36, Mizanur Rahman Babu, 22, Sohel Ahmed, 32 and Jony, 25.
CTTC Chief Monirul Islam disclosed the information in a press briefing Tuesday afternoon.
He said: “We conducted a drive and detained them with the tablets from a CNG refueling station in Jatrabari around 10:50pm on Monday.”
Meanwhile, the law enforcers also seized a covered van that was being used for drug peddling.
“A case has been filed against them with Jatrabari police station,” said Monirul Islam.