Four illegal liquor manufacturingunits were busted in Manipur's Thoubal district and one person was arrested, a senior police officer said.The police personnel seized 800 litres of country liquor and 2 kg of marijuana along with items used for making alcohol during search operations at the units in Ukhongshang Mayai area, Thoubal SP S Ibomcha said.One person was arrested during the raids while three others had managed to escape, he said.Manipur was declared a dry state in 1991, following widespread demands by locals to curb alcohol consumption and drug use.