Patients evacuated after Vic hospital fire

Brain-injured patients had to be moved in a Melbourne hospital as a small fire raged in a wall cavity.

Fire crews contained the blaze in the brain injury unit at the Caulfield General Medical after 10.30pm on Wednesday.

The cause of the fire - which spread into the wall cavity behind power points - is still unknown, the Metropolitan Fire Brigade says.

A hospital spokeswoman told AAP 15 patients were relocated to a different part of the hospital during the fire.