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.
The A14 between Histon and Girton in Cambridgeshire is officially completed after numerous delays to the project.
Highways England say the work will help improve journey times on the A14 near Cambridge because of a third lane that's been added in both directions between junctions 31 and 32. There have also been improvements to the westbound access roads to the M11 and A14 at the Girton interchange.
The improvements on the A14 are part of Highways England’s £317m pinch point programme to improve more than 100 congestion hotspots nationwide.
Construction work started in April 2014 and was completed on Sunday 13th September.
More overnight closures of the A14 at Girton will take place again tonight.
Both tonight and tomorrow night the eastbound carriageway of the A14 will be closed between junctions 31- 32 and there will be lane closures of the westbound carriageway.
Then between Monday 27th July and Friday 31st July the Eastbound carriageway will again be closed between junctions 31-32 and in addition there will be no westbound access to the A14 at either junction 32 or junction 36. All closures will all be effective between 8pm and 6am in the morning.
A 50mph speed restriction will remain in place along the road.
A section of the A14 in Cambridgeshire will be shut tonight while work on the Histon to Girton Pinch-Point programme continues.
The road will be closed westbound from 9.00pm until 6.00am on Tuesday June 17 between junction 36 and junction 31. Work is being carried out on safety barriers there.
The closure and diversions will be sign posted and details of the diversions can be found here.
A14 eastbound blocked, stationary traffic due to accident, three cars involved and debris on road at J31 M11 / A428 (Girton / Cloverleaf interchange).
Slow traffic due to debris on road and an accident on M11 Northbound between J13 A1303 (Cambridge / Madingley) and J14 A14 / A428 (Girton / Cloverleaf interchange).
One lane remains closed due to emergency repairs on the A14 Eastbound at J31 M11 / A428 (Girton / Cloverleaf interchange).
One lane remains closed due to emergency repairs and burst water main on A14 Eastbound at A1307 Huntingdon Road (Girton).
M11 southbound lane closed on entry slip road due to accident, two vehicles involved at J14 A14 (Girton / Cloverleaf interchange).
Two lanes closed, queueing traffic and long delays due to accident involving two lorries and a car on the A14 westbound before M11 (Girton Interchange), congestion to J32 B1049 (Histon Interchange).