Three workers died after inhaling toxic gas of a septic tank at Shimultala Dargarpar in Ashulia of Savar on Wednesday night. The deceased were identified as Mithu, Rakib and Mohammad Ali — workers of a factory of Al Rahman Knit Fashion BD Ltd. Momenul Islam, officer-in-charge of Ashulia Police Station, said cleaner Mithu along with two workers went into the septic tank of the factory at 3 pm. Also read: 2 workers without adequate protection die inside septic tank in Ctg Getting no response from them for a long time, the authorities concerned of the factory informed the local fire service. A team of fire service personnel rushed to the spot and recovered the bodies of the three workers around 9 pm. “Police are investigating the incident and legal steps will be taken after investigation,” said OC.