In a major mishap, at least 12 were killed and few others sustained severe injuries in a road accident at Vaddaipatla of PA Pally Mandal in Nalgonda district in the early hours of Friday. The mishap took place when the tractor in which they were travelling fell into the Canal. There were 30 people (Agriculture labours) when the tractor met with the accident. They were on the way to their work when the incident took place. The injured were rushed to the nearby hospital. Police registered a case and took up investigation.