A 73-year-old man arrested in Bideford under the explosive act has been released without charged.
Police have confirmed investigations being carried out at a property in Bridge Street are not being treated as criminal.
Instead the two-day long enquiries, which saw the road closed, were being treated ‘as a matter of public safety’.
Police confirmed no further action will be taken against the man in relation to this incident.
Officers were called at around 11.30am on Wednesday following concerns for the welfare of a woman in Bideford.
Initial enquiries led officers to attend an address in Bridge Street, Bideford.
Whilst at the address, some officers complained of feeling unwell and were immediately removed from the scene and a cordon put in place.
The ambulance Hazardous Area Response Team (HART) attended and treated these officers, all of whom are unharmed and have since returned to duty.
Following searches within the property, a number of items were found which required expert analysis from specialist officers and an Explosive Ordnance Disposal (EOD) team.
Police have also been supported by fire and ambulance staff at the scene.
A police spokesman said: “Officers worked closely with partner agencies to ensure the safety of the public and the property.
“Enquires have now been completed at the address and it has been deemed that there is no risk to the wider public.”