Police are questioning a man and a woman after a toddler was found with critical head injuries at a home at Lithgow on the New South Wales central tablelands overnight.

Emergency services found the 11-month-old girl unresponsive after being called to a home just before 9pm on Sunday.

The child was flown to The Children’s Hospital at Westmead, in Sydney, where she is in a critical condition with serious head injuries and has undergone surgery.

A crime scene has been set up at the home and forensic officers have begun examining the area.

Detectives from the Child Abuse Squad, which is attached to the State Crime Command, are set to lead an investigation into the incident.

Officers have travelled from Bathurst and Sydney to investigate.

Police said they were waiting for a report about the nature of the child’s injuries from doctors at the hospital.

Sergeant Darryl Goodwin said officers were speaking with a relative of the child and her partner who have been caring for the child.

“Triple-0 received a call in relation to a child that fell from a cot and injured its head,” Sergeant Goodwin said.

“On the way to hospital the child went into cardiac arrest and ambulance continued to work on the child and got a pulse.”

Sergeant Goodwin said the man and woman being questioned are both cooperating with police.

“Police are still continuing forensic examination of the house in relation to ongoing investigations,” he said.

– ABC