Police have warned people living near the former St Crispin’s Hospital site not to touch any fire debris blown onto their properties.
A multi-agency meeting has taken place at the site this morning following a large fire last night.
Northamptonshire Police said official advice was that windows and doors can be opened but people should still be cautious.
A police spokesman said: “Now the fire has been extinguished local people are safe to open doors and windows.
However, people are advised not to clear away any debris from the fire as it may contain asbestos. The local authority emergency planning team is organising for specialist cleaners to visit the area and remove the debris as soon as possible.”
Police also said the new play area at St Crispin’s has been closed while this work takes place, as debris has fallen in the area.
A multi-agency inspection of the site took place this morning, although no-one has been able to go into the building that was alight as it is still too hot to enter.
Investigations into the cause of the fire will only be able to take place once access to the site is possible.
However, police are conducting an investigation into the circumstances of how the fire started and are appealing for anyone who may have any information about it to contact them on 101 or Crimestoppers anonymously on 0800 555 111.
Meanwhile, police have confirmed that Northamptonshire Fire and Rescue Service were called to a small fire at the site on Sunday afternoon. Following that incident, the Arson Task Force made contact with the developers who own the site on Monday about making improvements to site security.
It is unknown what improvements were made as a result.