A mobile court seized 300 kg polythene bags from two traders in Phulbari upazila of the district yesterday. Executive Magistrate Ehtesham Reza, who led the court, also fined the traders Tk 5,000 each. The convicts are Md Mujahid, 45, and Ashraf Hossain, 38, of Munshipara village under Saidpur upazila in Nilphamari district, said MokshedAli, officer-in-charge of Phulbari Police Station.