Police received a report of a large fire in the Stream Street area of Downpatrick just after 7.10pm on Sunday, 28th June.
Officers attended to assist colleagues from Northern Ireland Fire & Rescue Service with traffic management until the blaze was extinguished in the early hours.
Fire Service have stated that ignition may have been deliberate and as such a scene is being held this morning, Monday 29th June, to allow for further investigation.
We would appeal to anyone with information to contact police using our witness appeal form at https://reporting.psni.police.uk/appeals - quoting reference 1509 28/06/26.
You can also contact us on 101.
Alternatively, call Crimestoppers anonymously on 0800 555 111 or online at http://crimestoppers-uk.org/