Three labourers involved in the constructing of a septic tank in ward 7 of Binayi Tribeni Rural Municipality died on Friday, likely due to asphyxiation from poisonous gas.

They were found unconscious while working inside the septic tank at the new under construction house belonging to local Bhola Singh Chhetri. They were rushed to the hospital, but were pronounced dead during treatment.

According to Deputy Superintendent of Police Bed Bahadur Paudel of the District Police Office, Nawalparasi East, the deceased are Prakash Singh Chhetri, 38, Ganesh Bogati, 19, and Mohammad Raja, 28.

All the three youths were from ward 7 of the rural municipality. The men were rushed to Bhairahawa Medical College, Rupandehi, where doctors pronounced them dead.

Two of the bodies are currently at Bhim Hospital in Bhairahawa, Rupandehi, while the third is at Prithvi Chandra District Hospital, Nawalparasi West for post-mortem, according to DSP Paudel.

Further investigation into the incident is ongoing. Lack of oxygen or poisonous gas often poses risks in confined spaces, according to doctors.