A Metropolitan Police counter-terrorism spokesperson said: “We can confirm that officers from counter-terrorism policing are investigating an incident at a commercial premises in Midpoint Way, Minworth.
“The investigation remains ongoing and there have been no arrests in our investigation at this time. As part of our enquiries, officers are liaising with other European law enforcement partners to identify whether this may or may not be connected to any other similar-type incidents across Europe.”
A government spokesperson said: “National security is the first priority of any government. We take any malicious activity that might pose a significant threat to our security and public safety extremely seriously.”
British investigators suspect the device was part of a wider campaign by Russian spies across Europe. Earlier this month, MI5 Director General Ken McCallum warned the Russian intelligence service GRU was on a “sustained mission to generate mayhem on British and European streets.”
Moscow has been suspected of other plots in the U.K. this year. In April, two British men were charged with helping Russian intelligence after a suspected arson attack at a warehouse belonging to a business linked to Ukraine.
