A man has been arrested after a suspicious package was sent to a factory where the AstraZeneca coronavirus vaccine is produced and stored in Wales.
Kent Police said on Thursday a 53-year-old man from Chatham, in Kent, 45km southeast of London, had been arrested on suspicion of sending the package, the contents of which have not been disclosed.
The man remains in custody as inquiries continue.
There is no evidence to suggest there is an ongoing threat, the force added.
On Wednesday morning, a warehouse in Wrexham, Wales, was partially evacuated after the package was sent to manufacturing partner of AstraZeneca, Wockhardt UK.
Bomb disposal experts were sent in to examine the package while police closed roads off in the area.
The contents were subsequently taken away for analysis.
Workers at Wockhardt UK were allowed to return several hours later and a spokesperson said the incident had in “no way” affected its production schedule for the AstraZeneca-Oxford vaccine.