Two children have reportedly died of a "mysterious" brain infection in two adjoining villages of the district this week.
Four-year-old Tamanna of Budha village died on October 23, while five-year-old Lovely of Budha Colony in Ladwa block breathed his last on October 25 at the Post Graduate Institute of Medical Education and Research (PGIMER) in Chandigarh.
After initial treatment at various hospitals in Ladwa, the children were referred to the PGIMER where they succumbed to the disease.
Dr Vandana Bhatia, a local civil surgeon, said here on Saturday that the children died of a brain infection, but what caused the infection was yet to be discovered.
She said they were down with high fever due to unspecified reasons, so were referred to the PGIMER.
"Initially, it was suspected that the two might have suffered from Japanese encephalitis (JE), but available medical reports and investigations by our teams have failed to link the deaths with those of JE or dengue. The PGIMER reports only state that the deaths were due to some brain infection," said Dr Bhaita.
She said the district health department had initiated various steps to control vector-borne diseases.
She directed the health officials to confirm if the deceased were immunised against the JE.
Most cases of JE are reported from the paddy-growing belt of Karnal, Kurukshetra and parts of Kaithal due to high concentration of culex mosquito in these areas.
After several deaths due to JE were reported in the past decade from Haryana, the state government started a free mass immunisation programme where children between 0 and 15 years were immunised against the disease.