Detectives from Nottinghamshire are looking into the discovery of a large quantity of suspected class B drugs in a storage unit in the Dunchurch area of Warwickshire.
It follows the arrest of a Daventry woman in connection with the discovery of drugs in a car on the M1 in Nottinghamshire earlier this month.
The 37-year-old has been bailed pending further enquiries.
Anyone who may have information about either development can telephone 101 and ask for Nottinghamshire Police.
Alternatively, they can call Crimestoppers anonymously on 0800 555 111.