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