Four men from Lincoln were arrested after drugs and an air weapon were recovered from a vehicle near Newark.
A vehicle was stopped by Nottinghamshire Police offers at Kelham near Newark during the evening of May 1. This followed a request by Lincolnshire Police.
Quantities of what are believed to be Mamba and Class A drugs, along with an air weapon, were recovered from the vehicle.
Four men – two aged 24, one aged 46 and another aged 50 – were then arrested on suspicion of possession with intent to supply Class A drugs. They have all since been released under investigation.