Police have arrested three foreign nationals and a Nepali national in possession of over five kg heroin.

According to the Narcotics Control Bureau, a Tanzanian national, two Indian nationals and a Nepali national were nabbed with the heroin.

DSP Jeevan Kumar Shrestha, Chief at the Narcotics Control Bureau, said that the detainees have been identified as Tanzanian national Abuu Liki Abdallah (30), Indian nationals Bikram Jeet Singh (43) and Munim Singh (46) and Nepali national Bikki Rauniyar (30).

Shrestha said that they were apprehended from a hotel in Boudha.

According to a preliminary investigation, Abdullah was a seller and two Indian nationals were the buyers.

Police launched an operation after they concluded that drugs were being smuggled to Nepal by making it as transit, DSP Shrestha said.

The Tanzanian national had landed at the Tribhuvan International Airport via Johannesburg of South Africa on a Fly Dubai flight on June 16.

A team deployed from the Bureau followed him after he was spotted behaving suspiciously at the airport.

The team from the Bureau detained him with 5.9 kg heroin hidden inside a suitcase.

During the interrogation, Indian nationals and a Nepali national were arrested from a hotel in Boudha.

Further investigation into the incident is underway.