“Hearing her screams, Antony and neighbours rushed to the spot and took the infant to a hospital, where she was declared dead. The baby’s grandmother has reportedly been under treatment for certain mental health issues, and what exactly happened inside the room remains unclear,” Mary said.

Following the incident, Rosily, however, became uncontrollable and was shifted to a hospital nearby for medical care, she added.

“Though there were no family disputes, the grandmother is suspected to have committed the crime. Bloodstains were found on her clothes, and the police have recovered the knife allegedly used in the crime from the premises,” said Tony Parappilly, ward member of Edakkunnu.

The woman has been booked for the offence of murder and steps will be taken during the day to formally record her arrest, police said.