Members of Rapid Action Battalion or RAB in a drive arrested two young men along with a foreign made revolver from Chowkidekhi in the city on Saturday evening.
The arrestees were identified as Sumon Ahmed Dhali Carlos, 24, son of late Belal Dhali of Amberkhana area of the city and Yamin Islam, 24, son of Md Sirajul Islam of Chowkidekhi area in Sylhet.
Acting on a tip-off, an elite force team conducted a drive in the area and arrested the duo with the firearm from in front of No 6 ward councilor's office around 7:30 pm.
The team also seized a CNG-run auto-rickshaw from the spot, said Moniruzzaman, senior assistant director of RAB-9.
The arrestee used to bring arms to the country through smuggling and carried out terrorist activities. They were involved in firearm selling business as well as hijacking for long, the RAB official said.
The accused were handed over to the SMP Airport Police Station, reports UNB.