Three people were killed by mass beating in the early hours of Thursday as the people were suspecting them dacoit in Ilamdi area under Araihazar upazila in the district. The deceased were identified as Mafizul Islam, 22, son of Sirajul Islam, hailed from Bastul area of Sonargaon upazila under Narayanganj district, Jahirul Islam, 27, son of Habibur Rahman of the same area and Nabi Hossain, 30, from Araihazar upazila. After being informed over phone, police rushed to the spot and recovered two bodies along with another severely injured, said officer-in -charge (OC) of Araihazar police station Anisur Rahman. The injured died on the way to the upazila health complex, said the police. A case has been filed with Araihazar police station.