At least four people were arrested with two firearms and 12 rounds of bullets from the border area of Bouara Bazar of Cumilla's Sadar upazila on Thursday night.
The arretees are Md Ripon of Muradpur area of Cumilla town, Md Sajjad Alam and Mustafar Rezwan Haider of Thakurpara area and Kazi Al Rabbi of Uttar Chartha area.
Nazmul Hasan Rafi, additional superintendent of police, disclosed the matter in a press breifing organised by the District Police Superintendent's office on Friday afternoon.
He said DB police of Cumilla set up a check post in the Balutupa area of Jagannathpur union and stopped two motorcycles on Thursday night.
Later, four people riding on the motorcycles were searched and recovered a foreign pistol, a revolver, 5 rounds of bullets from their possession.
On Friday morning, police recovered 7 rounds of bullets, two magazines and 2 covers of pistol from the house of Mustafar Rezwan in Thakurpara following the information given by him.
The police office also said that there are three cases against the accused Ripon, including arms and robbery, and one case each against Rabbi and Rezwan.
The arrestees were involved in drug and arms trade for a long time in India and border areas, he added.
Legal action has been taken against them.