Ghaziabad: In an incident that took place in Krishna Colony, at least five persons working for a water drainage project died of asphyxiation while cleaning a sewer in Ghaziabad on Thursday. According to sources, they were not wearing any safety equipment.

Initially, one worker went in. When one of the workers did not come out of the sewer for a long time, one by one, four others went inside to check. None of them came out alive.