A Vietnamese illegal immigrant was jailed for 39 months yesterday after admitting having two bullets without a licence. Dong Xuan Thom told the District Court he committed the offence because he wanted treatment for his drug addiction. In passing sentence Judge Andrew Chan Hing-wai cast doubt on Dong's motives. Dong, 33, had pleaded guilty to illegally entering Hong Kong and possessing the ammunition without a licence. He was caught at Lo Wu on August 9.