Following the death of one person and 40 others falling critically ill after the outbreak of diarrhoea in Toba village, the health authorities have launched an extensive campaign to curtail the spread of the disease in Indira Awas Colony of the village in Mullana segment of Ambala district. The local authorities said insanitary conditions led to the outbreak of the disease. It was learnt that water pipelines were laid through unhygienic areas, which probably resulted in the spread of the disease. Villagers stated that eight-year-old Kalpana, who was undergoing treatment by a private doctor at the village, died due to the disease yesterday while several more cases were being reported from the colony. Girl's father Mam Raj said his daughter suddenly had diarrhoea and vomiting and was taken to a local doctor. However, the girl could not recover and breathed her last yesterday. Meanwhile, waking up to the gravity of the situation, the administration dispatched rapid response health teams to the village. The teams started attending to patients and distributing medicines among those affected by the disease. Health officials maintained that contaminated water supply had been disconnected and samples were being taken to ascertain the exact cause of the spread of the disease. Officials were distributing chorine tables among local residents and urging them to consume only boiled water to rule out further infection. A team of doctors was stationed at the village. It was learnt that 15 persons were undergoing treatment at the village while 30 were admitted to different hospitals in Ambala Cantonment. Meanwhile, there were reports of two persons being critically ill. However, the district administration played down the outbreak and said all measures had been taken to make sure that further spread of the diseases was checked promptly.