The contents of a suspicious package found in Wales have been removed for analysis.
British Army bomb disposal experts and police were called to Wockhardt, a company involved in putting Oxford/AstraZeneca coronavirus vaccines into vials, at its Wrexham site.
Police will now conduct an investigation into the incident.
A spokesperson said: "There are no wider concerns for public safety, however some roads on the industrial estate will remain closed whilst we continue our investigations."
Police officers and the Army's 11 Explosive Ordnance Disposal and Search Regiment were called to the scene mid-morning on Wednesday.
While the incident caused a "temporary suspension of manufacturing", a Wockhardt spokesperson said it had "in no way affected our production schedule".
Welsh First Minister Mark Drakeford earlier tweeted: "We are working with local police and the military to find out more about this incident.
"Thank you to the security personnel who are on-site to protect lives and ensure the safety of our vaccine supply."
Cover image: PA.