Surat, March 7 Three workers died after being suspected of asphyxiation after entering an underground tank of a wastewater treatment plant (ETP) to clean at a dyeing mill in Surat city, Gujarat, police said on Saturday.
The condition of another worker remains critical, and he is receiving treatment at a hospital, an official said.
The incident occurred at Paras Print Private Limited in the Pandesara industrial area on Thursday night, but was reported to the police on Friday, he said.
Sonu Paswan (23), Dilip Paswan (19), and Sandeep Paswan (23) died, while another worker, Mahendra Paswan, is receiving treatment at a private hospital, Inspector JR Chaudhar said, adding that they were all from Bihar.
"As soon as they entered the ETP tank, all four lost consciousness and were rushed to a private hospital for treatment. The doctors declared three of them dead," he said.
Officials from the Gujarat Pollution Control Board and forensic officials have launched an investigation, and their report is awaited to determine the exact cause of death, the official said.