Cambridgeshire Police have spent the day searching a house in the Girton area following reports of an explosion.
Police say they are treating the incident as an isolated event and are not linking it with terrorism.
A 51 year old man has been arrested on suspicion of committing offences under the Explosives Act.
It's been revealed that an explosion which shook the Norfolk countryside and ripped apart buildings on an industrial estate was caused by a catalogue of errors.
It happened at Rackheath near Norwich 18 months ago. No one will be prosecuted though - as Natalie Gray reports.