Members of Rapid Action Battalion (RAB) cordon off a suspected militant den in Ashulia. Photo: Sazid HossainRapid Action Battalion (RAB) said four alleged militants have surrendered to them during a drive of the law enforcement in an Ashulia residence at Savar on the outskirts of the capital.RAB members cordoned off the area early Sunday suspecting it to be a militant den.Sounds of gunshots were also heard in regular intervals in the morning around 11:30am.RAB members take position near a suspected militant den in Ashulia. Photo: Sazid HossainRAB media and legal wing director Mufti Mahmood Khan at noon told reporters that four suspected militants have surrendered.Earlier in the morning, the RAB official said elite force men fenced off the house around 1:00am on Sunday.RAB members take position near a suspected militant den in Ashulia. Photo: Sazid HossainThe RAB media and legal wing director further said, “The area has been evacuated. We will begin a drive shortly.”The owner of the house, Ibrahim, was also under RAB custody for interrogation, he added.