Four persons were arrested on Friday from different places in the country for allegedly trafficking drugs, police said.
Bijaya Mahato, 25, was arrested with 4 kg of hemp from Parsa village council of Sarlahi district.
Police have recovered hemp hidden in his bag when he riding a bicycle near Nepal-India border in Sarlahi district, they said.
In the second incident, a 32-year-old man, Salikram was arrested from Birgunj Municipality of Parsa district with 20 ampules of diazepam, 20 ampules of Phenargan, and 20 ampules of Nurphin, police said.
He was nabbed while travelling on foot towards Nepal from India carrying the narcotic drugs.
In the third incident, Sanokanchha Yonjan, 33 and Paran Sahani, 34, along with 100 kg of hemp and a compressor machine used in hemp processing, were arrested, a p[olice official said.
The police have initiated probe into the cases, he added.