The police on February 18 seized four kg of low-grade uranium and arrested six persons in Supaul district along the Indo-Nepal border.
A police official on February 19 said acting on an intelligence tip-off, four kg of low-grade uranium was seized near Virpur bus stand in Supaul late on February 18 night.
The estimated value of the seized uranium is about Rs.50 million in the international market.
The police said the operation was conducted with the assistance of Seema Suraksha Bal (SSB) personnel. Six persons, including a schoolteacher and a SSB jawan posted in Assam, were arrested.
"We will interrogate the six persons," the police said.
The police suspect that the seized uranium was being smuggled from Meghalaya to Nepal.