Detectives in separate drives detained seven people from different parts in Dhaka on Monday afternoon.
They also recovered 36 thousand pieces of Yaba from their possession and seized a mini truck.
Two case were filled against them, said Assistant Deputy Commissioner Md. Shahjahan.
In Jatrabari, detectives conducted a drive and detained four people from a prayer space of Metro CNG drain station beside the Dhaka-Mawa road.
The detainees are Shahidullah, 30, Swapon Dutta, 32, Md. Mahbur Sarder, 30, and Mahmud Hossain, 30.
A total of 28 thousand pieces of Yaba were recovered from their possession.
Apart from, detectives in a drive detained three people from Shanir Akhra Bridge with 8 thousand pieces of Yaba.
They are Md. Ismail Hossain, 47, Md. Kala Hasan, 45, and Md. Barkot Ali, 35.