An investigation into an arson attack at a derelict 19th century former school in Thorpe St Andrew has been closed by police.

Eastern Daily Press: The fire as seen from the aerial platform at the former Thorpe House Langley Preparatory School site in Yarmouth Road, Thorpe St Andrew. Picture: Geraldine Scott.The fire as seen from the aerial platform at the former Thorpe House Langley Preparatory School site in Yarmouth Road, Thorpe St Andrew. Picture: Geraldine Scott. (Image: Archant)

Fire gutted part of the former Langley Preparatory School at Beech Hill, off Yarmouth Road, on Sunday, June 3 this year.

Around 40 firefighters tackled the blaze at its peak.

Norfolk Police launched an arson investigation, but today confirmed that all lines of enquiry have been 'exhausted'.

A police spokesman said the crime has now been closed.

Eastern Daily Press: A fire which took hold at the former Langley Preparatory School site is thought to have been arson. Picture: Dominic GilbertA fire which took hold at the former Langley Preparatory School site is thought to have been arson. Picture: Dominic Gilbert (Image: Archant)

'Should officers receive any further information relating this incident at a later date they will be investigated,' a police spokesman said.

Ocubis, development manager for site owner Berliet Ltd, said work has been carried out to make the former school building stable.

An Ocubis spokesman added: 'Twenty-four-hour security and fencing are being deployed as before to deter unlawful entry to the site.'