The four children died in Muzaffarpur district after reporting high fever followed by convulsions and unconsciousness.
Bihar Health Minister Ashwani Kumar Choubey told IANS that two expert teams will help identify the disease that had killed several children in last few days.
"It is not proper to term it encephalitis," Choubey said.
According to reports, an expert team from the central government visited hospitals in Muzaffarpur where over three dozen children were undergoing treatment. "A two-member team of experts from New Delhi visited hospitals and examined children to identify the disease," a health official said.
Another team from Pune is likely to visit the district for investigation, officials said. Locals termed the disease "chamki ki bimari" and said the symptoms were similar to encephalitis, a disease that causes inflammation of the brain.
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