Two minor siblings belonging to the same family died Tuesday apparently due to some illness in suburban Ghatkopar in Mumbai, the police said.
The exact reason behind the deaths is yet to be ascertained for want of the medical report, an official said.
The incident occurred at Kamrajnagar this morning at the residence of one Indar Yadav (34), a carpenter, he said.
Yadav's wife Shanti (32), was feeding her three-year-old daughter Nandan, after which she started coughing, he said.
Nandan, who was suffering from cold and fever, was taken to a civic-run hospital, where she died during treatment, he said.
Yadav's four-year-old son Kishore also died after few hours apparently due to fever and epilepsy, the official said.
After deaths of Nandan and Kishore, two other children of Yadav were admitted in the hospital for observation, the official said.
A case has been registered at Pantnagar police station and further investigation is on.