The gang of four to five youths waylaid Abdus Sattar, assistant-sub inspector of Special Branch (SB) of police, near Peer Jangi Mazar at about 6:10am when he was going to receive the minister at Kamlapur Railway Station, police said.

They took away his licensed revolver, eight bullets and a magazine, police added.

The state minister was scheduled to arrive at Kamlapur Railway Station from Chittagong in a train.

"One of the youths pointed a pistol at my forehead, two brandished machete and home-made bombs while another forcibly snatched my 7.62 revolver, magazine, ammunition and my purse with Tk 150 and some important documents," Sattar said in a FIR (first information report) filed with Motijheel Police Station.

"The criminals, aged between 18 and 22, hurled a bomb when I cried for help and left the scene," he added.

The police official said a gang member also attempted to snatch his walkie-talkie, but retreated as he threw it away, causing damage to the set.

Police failed to arrest anybody till 7:30pm.