Around 200 high explosive anti-tank weapons with as many chargers were recovered in a daylong drive in the Satchharhi hill, RAB’s Additional Director General (operations) Col Ziaul Ahsan said.
There might be more ammo, he said.
The recovery at Satchharhi on Tuesday is perhaps the single biggest case of arms seizure since the 2004 Chittagong arms case.
The huge cache was found inside bunkers dug in deep holes in the hillock, the official said.
The source of the ammo will be known after further investigation, he said.
The RAB officials were preparing to conduct the drive for several days in Satchharhi, barely 3 kms from the border with India's Tripura state.
Around 100 RAB personnel conducted the raid at the 100-foot hillock with dogs.
RAB's Col Ahsan and Legal-Media director Wing Commander Habibur Rahman oversaw the raid.
The officials called off the drive for Tuesday as daylight faded, Col Ahsan told bdnews24.com on his way back to Dhaka.
The drive will resume on Wednesday morning, he said.
He said they had found 184 high explosive anti-tank weapons and 154 chargers.
The drive was launched on a tip-off, RAB official Habib told reporters in Satchharhi.
(Additional reporting by Syed Bashir)