A 27-year-old man, identified as Ropchen Ali Fula, was nabbed at Sahapara in West Garo Hills district last night. He is suspected to be involved in anti-national activities and has been handed over to the police.
BSF also apprehended another Bangladeshi national in the Gopinath Killa area of the district last night, the sources said.
In a separate incident, the troops seized 150 kg ganja worth over Rs seven lakh in the international market and a country-made boat from the riverine border in Assam's Dhubri district, they said.
The smugglers who were taking the contraband across the border, however, managed to flee in the cover of darkness, the sources added.