Residents were forced to evacuate their homes after an arson attack at a derelict building in Londonderry.

The fire started at about 06:00 BST on Saturday at the former gym on Grainan Drive.

Police said no one was in the building at the time and no injuries were reported but residents from the adjoining property were evacuated as a safety precaution.

One resident said they awoke to "banging on the door" but after two hours they were able to return to their homes once the fire was brought under control.

The Police Service of Northern Ireland has appealed to anyone with any information to come forward.