Thames Valley Police received a call at around 9.30pm today (10/7) to assist the fire service in Bedwyn Mews, Reading.
A fire was reported in an underground car park.
Officers assisted the fire service with an evacuation of the flats above the car park, no-one was injured and residents are now allowed to return to their properties.
Road closures in place have now been lifted however a scene is in place in the car park as an investigation is underway.
If anyone witnessed what happened, please contact police on 101 or make a report online quoting reference 1569 (10/7).