The rear side of the office building has been slightly damaged due to the explosion. There are no human casualties in the incident, the District Police Office, Bardiya, said.
It is suspected that the underground outfit might have carried out the bomb explosion with the intention of extortion by spreading terror. However, Pawan Singh, the Tharuhat on-charge of the party, refutes this.
Singh said his party has exploded the bomb as a warning to the customs office as it collected unnecessary customs charges and harassed when Nepali farmers living near the Nepal-India border took their agricultural produce for sale across the border to Indian markets.
Police have been mobilized in the area immediately after the explosion and a search is underway for the people involved in the incident, according to the District Police Office, Bardiya.
IED explodes in Chulachuli Rural Municipal office