A 6-month-old Kapiti girl has suffered a "severe" head injury, sparking a police probe into how the injury occurred.
The girl was airlifted to Wellington Hospital yesterday after an ambulance was called to an address in Kapiti, north of Wellington, about 4.30pm.
A Wellington Hospital spokesman said the girl remained in a critical condition in the hospital's intensive care unit this evening.
Detective Senior Sergeant Grant Ferguson said the Wellington criminal investigation bureau had launched an investigation.
"This little 6-month-old girl has received a severe injury to her head. We are in the process of unraveling the circumstances that have led to this injury occurring," he said.