A youth has been released on bail pending further inquiries after an arson attack at vacant premises in the Donnybrewer Road area of Londonderry.
Police were made aware of the fire at 5.40pm on May 14.
Extensive damage was caused to the building.
Police would ask anyone who may have witnessed this incident or who has any information to contact them at Strand Road on the new non emergency number 101.
Or, if someone would prefer to provide information without giving their details they can contact the independent charity Crimestoppers and speak to them anonymously on 0800 555 111.