Dhananjay Kumar, a local man, said the spray created a “massive fog”, adding: “It seems the chemicals sprayed by authorities led to the disease.”
However, health officials said the exact cause of the illness was unknown.
“We were informed by some locals that anti-mosquito spray resulted in the infection. As of now, I can only say the exact cause is not known yet. We have sent samples to New Delhi and expect the reports on Tuesday,” they said.
“We ruled out water contamination or air pollution after officials visited the areas where people fell sick,” Alla Kali Krishna Srinivas, the state’s health minister, said, with those in hospital testing negative for COVID-19.