Ground investigations are to be carried out at a Moray primary school after aerial imagery emerged of a wartime trench on the playing fields.
Council staff spotted the military defensive trench in an aerial photograph from 1943 while researching another site in Elgin.
The council says it is possible caches of weapons may have been buried there.
Several days of digging will take place at West End Primary School, but will be completed before the new school term.
Staff from Moray Council's environmental health section noticed the distinctive zig-zag trench alongside a number of military trucks in the grounds of the school in the image from the National Collection of Aerial Photography.
The site is likely to have been used by the Home Guard, and while it is not thought live ammunition training took place, staff at the local authority believe it is possible weapons could have been buried at the site.
A spokesman said: "It's only thanks to the emergence of the photograph that we became aware of this trench and the plan is to undertake a comprehensive geophysical survey of the site.
"Any anomalies that the survey throws up will be excavated and dealt with.
"The work will begin on Monday and should only take two or three days, so it will be completed before the school reopens after the holidays."