Police in northern Vietnam said they have arrested two men suspected of operating a DIY weapon workshop during a raid on Wednesday and are searching for other suspects.

The police of Quang Ninh Province said they raided the house of Cao Dang Suu's on Wednesday night after receiving reports that Suu had used a shotgun to threaten another person.

They seized 10 home-made guns, 30 detonators, 29 bars of dynamite, 21 bullets, 12 grenades and dozens of gun parts in the house.

Suu and Bui Van Trang, allegedly his assistant, are in police custody for investigation.

Illegal manufacturing and trade of weapons is a crime under Vietnam's Penal Code, which is punishable by prison terms ranging from one year to life imprisonment. 

According to the police, Suu used to be lead a criminal gang in Ha Long Town, Quang Ninh Province, before switching to gunsmithing in order to feed his drug addiction.

Police believed that many other accomplices of Suu's at the workshop are on the loose.