Police in separate drives recovered four firearms and four rounds of bullet from separate places in Dumuria and Dacope upazilas on Wednesday night.
Police said, on secret information that two miscreants were taking preparation to carry out subversive activities they conducted operation at Manda village in Dumuria upazila at about 10:30pm.
Sensing the presence of the law enforcers the miscreants fled the area. Later, they recovered two shutter guns and four rounds of bullet from the spot.
Meanwhile, police conducted another drive at Banishanta in Dacope upazila at about 1:30am and recovered two country made pistols in abandoned condition. None was arrested in this connection.
Two separate cases were filed with Dumuria and Dacope thana.