Four prisoners were transferred after a mattress fire in the Whakatāne Police Station.
Police were made aware of a mattress fire in a holding cell on Boon St at 6.15pm yesterday and called firefighters.
The fire had been extinguished and two trucks stayed on the scene to get rid of the smoke.
A police media spokeswoman said four prisoners were transferred to the Rotorua Police Station for their wellbeing.
A St John media spokeswoman said ambulance were called to the scene but there were no injuries and no one needed to be treated for smoke inhalation.
The cause of the fire is being investigated.