The four victims, part of a group of lemon traders, went to Labdanguri market in Salbari sub-division from adjacent Barpeta district on Friday evening but did not return.
"It is suspected that they have been kidnapped by the National Democratic Front of Bodoland (Songbijit) militants," Baksa additional deputy commissioner Bhawani Prasad Sharma said.
Following this, indefinite curfew was clamped in Salbari. "Indefinite curfew has been imposed in Salbari sub-division under Gobardhana police station," Sharma said.
"Police and CRPF jawans are conducting a massive search to rescue the four. The Army has also been called in and kept on standby to deal with any untoward situation in the district," Baksa deputy commissioner Vinod Seshan said.
Seshan said four cycles and sandals were found from a nearby area.
The four missing people have been identified as — Bakar Ali (13), Saddam Ali (13), Ataur Rahman (27) and Rahul Amin (45), he said.
In May this year, 50 people were killed in Baksa and Kokrajhar districts of the Bodoland Territorial Area Districts by suspected Bodoland Peoples Front-supported insurgents.
NIA and the state government were making separate investigations into it.
http://timesofindia.indiatimes.com/followceleb.cms?alias=National Democratic Front of Bodoland,indefinite curfew in Baksa,indefinite curfew,Four kidnapped in Assam's Baksa district