The man was arrested while he was trying to contact an Improvised Explosive Device (IED) courier last night. The courier smuggled an explosive consignment from neighbouring Myanmar, it said.
The man, held by a combined team of Assam Rifles and state police commandos, is an expert in handling IEDs, it said.
He has been working for the outfit since 2002 and "is a close aide of many self styled commanders of the prescribed group," it said.
Preliminary investigation revealed that he had confessed to his involvement in preparing IEDs for targeting security forces four times in the past, the statement said.
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