Three people, including a sub-inspector (SI) of police, have been detained by Rapid Action Battalion (Rab) with 240 bottles of phensedyl and two guns from Narayanganj's Sonargaon upazila.

The arrests took place around 11pm on Monday near Meghna Toll Plaza area. The detained police personnel has been identified as Kaikobad Khan Pathan (30), a sub-inspector of Kalapahariya Police Outpost under Araihazar. The identities of the other detainees could not be known yet, said law enforcers.

"Tipped off, a team of Rab-3 set up a check-post in the area to search their vehicles. During search, police recovered 240 bottles of phensedyl and two guns from a private car with a police sticker. The three passengers of the car were detained in this connection," said Farzana Haque, senior assistant director of Rab-3.

"Primary interrogation revealed one of the detainees to be an SI of police. Hence it is likely that one of the guns belongs to the government while the other might be illegally possessed," the Rab official said, adding the detainees and seized items were handed over to Sonargaon Police Station.

Confirming the incident, Rafiqul Islam, officer-in-charge (OC) of Sonargaon Police Station, told The Daily Star that filing of a case was underway.