A female readymade garments factory worker was gang-raped in her factory bus in Dhondi area of Sonargaon upazila on Monday night. Sub-inspector of Sonargaon police station Md Aminul Islam said that the victim and other female workers were returning to residences in Dhondi area of Sonargaon from Araihazar upazila by their factory bus. They all were workers of Fakir Garments Factory in Araihazar upazila. When all but the victim got down from the bus, the bus driver Chandu Mia, his helper Rubel and other associates raped the girl in the vehicle. The girl became unconscious and the rapists fled leaving at a nearby house on the road. The bus started journey at 10.30 pm after the factory was closed and dropped passengers in different areas. Police being informed conducted a raid on Tuesday and arrested bus helper Rubel. OC of Sonargaon police station Kamrul Islam admitting the fact said that the drive will continue to arrest the culprits.